12ab9cd1cSSteven Whitehouse /* 22ab9cd1cSSteven Whitehouse * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 3f2741d98SSteven Whitehouse * Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved. 42ab9cd1cSSteven Whitehouse * 52ab9cd1cSSteven Whitehouse * This copyrighted material is made available to anyone wishing to use, 62ab9cd1cSSteven Whitehouse * modify, copy, or redistribute it subject to the terms and conditions 72ab9cd1cSSteven Whitehouse * of the GNU General Public License version 2. 82ab9cd1cSSteven Whitehouse */ 92ab9cd1cSSteven Whitehouse 102ab9cd1cSSteven Whitehouse #include <linux/slab.h> 112ab9cd1cSSteven Whitehouse #include <linux/spinlock.h> 122ab9cd1cSSteven Whitehouse #include <linux/completion.h> 132ab9cd1cSSteven Whitehouse #include <linux/buffer_head.h> 142ab9cd1cSSteven Whitehouse #include <linux/namei.h> 152ab9cd1cSSteven Whitehouse #include <linux/mm.h> 162ab9cd1cSSteven Whitehouse #include <linux/xattr.h> 172ab9cd1cSSteven Whitehouse #include <linux/posix_acl.h> 182ab9cd1cSSteven Whitehouse #include <linux/gfs2_ondisk.h> 192ab9cd1cSSteven Whitehouse #include <linux/crc32.h> 202ab9cd1cSSteven Whitehouse #include <linux/fiemap.h> 212ab9cd1cSSteven Whitehouse #include <linux/security.h> 222ab9cd1cSSteven Whitehouse #include <asm/uaccess.h> 232ab9cd1cSSteven Whitehouse 242ab9cd1cSSteven Whitehouse #include "gfs2.h" 252ab9cd1cSSteven Whitehouse #include "incore.h" 262ab9cd1cSSteven Whitehouse #include "acl.h" 272ab9cd1cSSteven Whitehouse #include "bmap.h" 282ab9cd1cSSteven Whitehouse #include "dir.h" 292ab9cd1cSSteven Whitehouse #include "xattr.h" 302ab9cd1cSSteven Whitehouse #include "glock.h" 312ab9cd1cSSteven Whitehouse #include "inode.h" 322ab9cd1cSSteven Whitehouse #include "meta_io.h" 332ab9cd1cSSteven Whitehouse #include "quota.h" 342ab9cd1cSSteven Whitehouse #include "rgrp.h" 352ab9cd1cSSteven Whitehouse #include "trans.h" 362ab9cd1cSSteven Whitehouse #include "util.h" 372ab9cd1cSSteven Whitehouse #include "super.h" 382ab9cd1cSSteven Whitehouse #include "glops.h" 392ab9cd1cSSteven Whitehouse 402ab9cd1cSSteven Whitehouse struct gfs2_skip_data { 412ab9cd1cSSteven Whitehouse u64 no_addr; 422ab9cd1cSSteven Whitehouse int skipped; 432ab9cd1cSSteven Whitehouse int non_block; 442ab9cd1cSSteven Whitehouse }; 452ab9cd1cSSteven Whitehouse 462ab9cd1cSSteven Whitehouse static int iget_test(struct inode *inode, void *opaque) 472ab9cd1cSSteven Whitehouse { 482ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 492ab9cd1cSSteven Whitehouse struct gfs2_skip_data *data = opaque; 502ab9cd1cSSteven Whitehouse 512ab9cd1cSSteven Whitehouse if (ip->i_no_addr == data->no_addr) { 522ab9cd1cSSteven Whitehouse if (data->non_block && 532ab9cd1cSSteven Whitehouse inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)) { 542ab9cd1cSSteven Whitehouse data->skipped = 1; 552ab9cd1cSSteven Whitehouse return 0; 562ab9cd1cSSteven Whitehouse } 572ab9cd1cSSteven Whitehouse return 1; 582ab9cd1cSSteven Whitehouse } 592ab9cd1cSSteven Whitehouse return 0; 602ab9cd1cSSteven Whitehouse } 612ab9cd1cSSteven Whitehouse 622ab9cd1cSSteven Whitehouse static int iget_set(struct inode *inode, void *opaque) 632ab9cd1cSSteven Whitehouse { 642ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 652ab9cd1cSSteven Whitehouse struct gfs2_skip_data *data = opaque; 662ab9cd1cSSteven Whitehouse 672ab9cd1cSSteven Whitehouse if (data->skipped) 682ab9cd1cSSteven Whitehouse return -ENOENT; 692ab9cd1cSSteven Whitehouse inode->i_ino = (unsigned long)(data->no_addr); 702ab9cd1cSSteven Whitehouse ip->i_no_addr = data->no_addr; 712ab9cd1cSSteven Whitehouse return 0; 722ab9cd1cSSteven Whitehouse } 732ab9cd1cSSteven Whitehouse 742ab9cd1cSSteven Whitehouse struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr, int non_block) 752ab9cd1cSSteven Whitehouse { 762ab9cd1cSSteven Whitehouse unsigned long hash = (unsigned long)no_addr; 772ab9cd1cSSteven Whitehouse struct gfs2_skip_data data; 782ab9cd1cSSteven Whitehouse 792ab9cd1cSSteven Whitehouse data.no_addr = no_addr; 802ab9cd1cSSteven Whitehouse data.skipped = 0; 812ab9cd1cSSteven Whitehouse data.non_block = non_block; 822ab9cd1cSSteven Whitehouse return ilookup5(sb, hash, iget_test, &data); 832ab9cd1cSSteven Whitehouse } 842ab9cd1cSSteven Whitehouse 852ab9cd1cSSteven Whitehouse static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr, 862ab9cd1cSSteven Whitehouse int non_block) 872ab9cd1cSSteven Whitehouse { 882ab9cd1cSSteven Whitehouse struct gfs2_skip_data data; 892ab9cd1cSSteven Whitehouse unsigned long hash = (unsigned long)no_addr; 902ab9cd1cSSteven Whitehouse 912ab9cd1cSSteven Whitehouse data.no_addr = no_addr; 922ab9cd1cSSteven Whitehouse data.skipped = 0; 932ab9cd1cSSteven Whitehouse data.non_block = non_block; 942ab9cd1cSSteven Whitehouse return iget5_locked(sb, hash, iget_test, iget_set, &data); 952ab9cd1cSSteven Whitehouse } 962ab9cd1cSSteven Whitehouse 972ab9cd1cSSteven Whitehouse /** 982ab9cd1cSSteven Whitehouse * gfs2_set_iop - Sets inode operations 992ab9cd1cSSteven Whitehouse * @inode: The inode with correct i_mode filled in 1002ab9cd1cSSteven Whitehouse * 1012ab9cd1cSSteven Whitehouse * GFS2 lookup code fills in vfs inode contents based on info obtained 1022ab9cd1cSSteven Whitehouse * from directory entry inside gfs2_inode_lookup(). 1032ab9cd1cSSteven Whitehouse */ 1042ab9cd1cSSteven Whitehouse 1052ab9cd1cSSteven Whitehouse static void gfs2_set_iop(struct inode *inode) 1062ab9cd1cSSteven Whitehouse { 1072ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 1082ab9cd1cSSteven Whitehouse umode_t mode = inode->i_mode; 1092ab9cd1cSSteven Whitehouse 1102ab9cd1cSSteven Whitehouse if (S_ISREG(mode)) { 1112ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_file_iops; 1122ab9cd1cSSteven Whitehouse if (gfs2_localflocks(sdp)) 1132ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_file_fops_nolock; 1142ab9cd1cSSteven Whitehouse else 1152ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_file_fops; 1162ab9cd1cSSteven Whitehouse } else if (S_ISDIR(mode)) { 1172ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_dir_iops; 1182ab9cd1cSSteven Whitehouse if (gfs2_localflocks(sdp)) 1192ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_dir_fops_nolock; 1202ab9cd1cSSteven Whitehouse else 1212ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_dir_fops; 1222ab9cd1cSSteven Whitehouse } else if (S_ISLNK(mode)) { 1232ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_symlink_iops; 1242ab9cd1cSSteven Whitehouse } else { 1252ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_file_iops; 1262ab9cd1cSSteven Whitehouse init_special_inode(inode, inode->i_mode, inode->i_rdev); 1272ab9cd1cSSteven Whitehouse } 1282ab9cd1cSSteven Whitehouse } 1292ab9cd1cSSteven Whitehouse 1302ab9cd1cSSteven Whitehouse /** 1312ab9cd1cSSteven Whitehouse * gfs2_inode_lookup - Lookup an inode 1322ab9cd1cSSteven Whitehouse * @sb: The super block 1332ab9cd1cSSteven Whitehouse * @no_addr: The inode number 1342ab9cd1cSSteven Whitehouse * @type: The type of the inode 1352ab9cd1cSSteven Whitehouse * non_block: Can we block on inodes that are being freed? 1362ab9cd1cSSteven Whitehouse * 1372ab9cd1cSSteven Whitehouse * Returns: A VFS inode, or an error 1382ab9cd1cSSteven Whitehouse */ 1392ab9cd1cSSteven Whitehouse 1402ab9cd1cSSteven Whitehouse struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, 1412ab9cd1cSSteven Whitehouse u64 no_addr, u64 no_formal_ino, int non_block) 1422ab9cd1cSSteven Whitehouse { 1432ab9cd1cSSteven Whitehouse struct inode *inode; 1442ab9cd1cSSteven Whitehouse struct gfs2_inode *ip; 1452ab9cd1cSSteven Whitehouse struct gfs2_glock *io_gl = NULL; 1462ab9cd1cSSteven Whitehouse int error; 1472ab9cd1cSSteven Whitehouse 1482ab9cd1cSSteven Whitehouse inode = gfs2_iget(sb, no_addr, non_block); 1492ab9cd1cSSteven Whitehouse ip = GFS2_I(inode); 1502ab9cd1cSSteven Whitehouse 1512ab9cd1cSSteven Whitehouse if (!inode) 1522ab9cd1cSSteven Whitehouse return ERR_PTR(-ENOBUFS); 1532ab9cd1cSSteven Whitehouse 1542ab9cd1cSSteven Whitehouse if (inode->i_state & I_NEW) { 1552ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 1562ab9cd1cSSteven Whitehouse ip->i_no_formal_ino = no_formal_ino; 1572ab9cd1cSSteven Whitehouse 1582ab9cd1cSSteven Whitehouse error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); 1592ab9cd1cSSteven Whitehouse if (unlikely(error)) 1602ab9cd1cSSteven Whitehouse goto fail; 1612ab9cd1cSSteven Whitehouse ip->i_gl->gl_object = ip; 1622ab9cd1cSSteven Whitehouse 1632ab9cd1cSSteven Whitehouse error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); 1642ab9cd1cSSteven Whitehouse if (unlikely(error)) 1652ab9cd1cSSteven Whitehouse goto fail_put; 1662ab9cd1cSSteven Whitehouse 1672ab9cd1cSSteven Whitehouse set_bit(GIF_INVALID, &ip->i_flags); 1682ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); 1692ab9cd1cSSteven Whitehouse if (unlikely(error)) 1702ab9cd1cSSteven Whitehouse goto fail_iopen; 1712ab9cd1cSSteven Whitehouse 1722ab9cd1cSSteven Whitehouse ip->i_iopen_gh.gh_gl->gl_object = ip; 1732ab9cd1cSSteven Whitehouse gfs2_glock_put(io_gl); 1742ab9cd1cSSteven Whitehouse io_gl = NULL; 1752ab9cd1cSSteven Whitehouse 1762ab9cd1cSSteven Whitehouse if (type == DT_UNKNOWN) { 1772ab9cd1cSSteven Whitehouse /* Inode glock must be locked already */ 1782ab9cd1cSSteven Whitehouse error = gfs2_inode_refresh(GFS2_I(inode)); 1792ab9cd1cSSteven Whitehouse if (error) 1802ab9cd1cSSteven Whitehouse goto fail_refresh; 1812ab9cd1cSSteven Whitehouse } else { 1822ab9cd1cSSteven Whitehouse inode->i_mode = DT2IF(type); 1832ab9cd1cSSteven Whitehouse } 1842ab9cd1cSSteven Whitehouse 1852ab9cd1cSSteven Whitehouse gfs2_set_iop(inode); 1862ab9cd1cSSteven Whitehouse unlock_new_inode(inode); 1872ab9cd1cSSteven Whitehouse } 1882ab9cd1cSSteven Whitehouse 1892ab9cd1cSSteven Whitehouse return inode; 1902ab9cd1cSSteven Whitehouse 1912ab9cd1cSSteven Whitehouse fail_refresh: 1922ab9cd1cSSteven Whitehouse ip->i_iopen_gh.gh_gl->gl_object = NULL; 1932ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&ip->i_iopen_gh); 1942ab9cd1cSSteven Whitehouse fail_iopen: 1952ab9cd1cSSteven Whitehouse if (io_gl) 1962ab9cd1cSSteven Whitehouse gfs2_glock_put(io_gl); 1972ab9cd1cSSteven Whitehouse fail_put: 1982ab9cd1cSSteven Whitehouse ip->i_gl->gl_object = NULL; 1992ab9cd1cSSteven Whitehouse gfs2_glock_put(ip->i_gl); 2002ab9cd1cSSteven Whitehouse fail: 2012ab9cd1cSSteven Whitehouse iget_failed(inode); 2022ab9cd1cSSteven Whitehouse return ERR_PTR(error); 2032ab9cd1cSSteven Whitehouse } 2042ab9cd1cSSteven Whitehouse 2052ab9cd1cSSteven Whitehouse struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, 2062ab9cd1cSSteven Whitehouse u64 *no_formal_ino, unsigned int blktype) 2072ab9cd1cSSteven Whitehouse { 2082ab9cd1cSSteven Whitehouse struct super_block *sb = sdp->sd_vfs; 2092ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 2102ab9cd1cSSteven Whitehouse struct inode *inode = NULL; 2112ab9cd1cSSteven Whitehouse int error; 2122ab9cd1cSSteven Whitehouse 2132ab9cd1cSSteven Whitehouse /* Must not read in block until block type is verified */ 2142ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_num(sdp, no_addr, &gfs2_inode_glops, 2152ab9cd1cSSteven Whitehouse LM_ST_EXCLUSIVE, GL_SKIP, &i_gh); 2162ab9cd1cSSteven Whitehouse if (error) 2172ab9cd1cSSteven Whitehouse return ERR_PTR(error); 2182ab9cd1cSSteven Whitehouse 2192ab9cd1cSSteven Whitehouse error = gfs2_check_blk_type(sdp, no_addr, blktype); 2202ab9cd1cSSteven Whitehouse if (error) 2212ab9cd1cSSteven Whitehouse goto fail; 2222ab9cd1cSSteven Whitehouse 2232ab9cd1cSSteven Whitehouse inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, 1); 2242ab9cd1cSSteven Whitehouse if (IS_ERR(inode)) 2252ab9cd1cSSteven Whitehouse goto fail; 2262ab9cd1cSSteven Whitehouse 2272ab9cd1cSSteven Whitehouse /* Two extra checks for NFS only */ 2282ab9cd1cSSteven Whitehouse if (no_formal_ino) { 2292ab9cd1cSSteven Whitehouse error = -ESTALE; 2302ab9cd1cSSteven Whitehouse if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino) 2312ab9cd1cSSteven Whitehouse goto fail_iput; 2322ab9cd1cSSteven Whitehouse 2332ab9cd1cSSteven Whitehouse error = -EIO; 2342ab9cd1cSSteven Whitehouse if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) 2352ab9cd1cSSteven Whitehouse goto fail_iput; 2362ab9cd1cSSteven Whitehouse 2372ab9cd1cSSteven Whitehouse error = 0; 2382ab9cd1cSSteven Whitehouse } 2392ab9cd1cSSteven Whitehouse 2402ab9cd1cSSteven Whitehouse fail: 2412ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 2422ab9cd1cSSteven Whitehouse return error ? ERR_PTR(error) : inode; 2432ab9cd1cSSteven Whitehouse fail_iput: 2442ab9cd1cSSteven Whitehouse iput(inode); 2452ab9cd1cSSteven Whitehouse goto fail; 2462ab9cd1cSSteven Whitehouse } 2472ab9cd1cSSteven Whitehouse 2482ab9cd1cSSteven Whitehouse 2492ab9cd1cSSteven Whitehouse struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) 2502ab9cd1cSSteven Whitehouse { 2512ab9cd1cSSteven Whitehouse struct qstr qstr; 2522ab9cd1cSSteven Whitehouse struct inode *inode; 2532ab9cd1cSSteven Whitehouse gfs2_str2qstr(&qstr, name); 2542ab9cd1cSSteven Whitehouse inode = gfs2_lookupi(dip, &qstr, 1); 2552ab9cd1cSSteven Whitehouse /* gfs2_lookupi has inconsistent callers: vfs 2562ab9cd1cSSteven Whitehouse * related routines expect NULL for no entry found, 2572ab9cd1cSSteven Whitehouse * gfs2_lookup_simple callers expect ENOENT 2582ab9cd1cSSteven Whitehouse * and do not check for NULL. 2592ab9cd1cSSteven Whitehouse */ 2602ab9cd1cSSteven Whitehouse if (inode == NULL) 2612ab9cd1cSSteven Whitehouse return ERR_PTR(-ENOENT); 2622ab9cd1cSSteven Whitehouse else 2632ab9cd1cSSteven Whitehouse return inode; 2642ab9cd1cSSteven Whitehouse } 2652ab9cd1cSSteven Whitehouse 2662ab9cd1cSSteven Whitehouse 2672ab9cd1cSSteven Whitehouse /** 2682ab9cd1cSSteven Whitehouse * gfs2_lookupi - Look up a filename in a directory and return its inode 2692ab9cd1cSSteven Whitehouse * @d_gh: An initialized holder for the directory glock 2702ab9cd1cSSteven Whitehouse * @name: The name of the inode to look for 2712ab9cd1cSSteven Whitehouse * @is_root: If 1, ignore the caller's permissions 2722ab9cd1cSSteven Whitehouse * @i_gh: An uninitialized holder for the new inode glock 2732ab9cd1cSSteven Whitehouse * 2742ab9cd1cSSteven Whitehouse * This can be called via the VFS filldir function when NFS is doing 2752ab9cd1cSSteven Whitehouse * a readdirplus and the inode which its intending to stat isn't 2762ab9cd1cSSteven Whitehouse * already in cache. In this case we must not take the directory glock 2772ab9cd1cSSteven Whitehouse * again, since the readdir call will have already taken that lock. 2782ab9cd1cSSteven Whitehouse * 2792ab9cd1cSSteven Whitehouse * Returns: errno 2802ab9cd1cSSteven Whitehouse */ 2812ab9cd1cSSteven Whitehouse 2822ab9cd1cSSteven Whitehouse struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, 2832ab9cd1cSSteven Whitehouse int is_root) 2842ab9cd1cSSteven Whitehouse { 2852ab9cd1cSSteven Whitehouse struct super_block *sb = dir->i_sb; 2862ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 2872ab9cd1cSSteven Whitehouse struct gfs2_holder d_gh; 2882ab9cd1cSSteven Whitehouse int error = 0; 2892ab9cd1cSSteven Whitehouse struct inode *inode = NULL; 2902ab9cd1cSSteven Whitehouse int unlock = 0; 2912ab9cd1cSSteven Whitehouse 2922ab9cd1cSSteven Whitehouse if (!name->len || name->len > GFS2_FNAMESIZE) 2932ab9cd1cSSteven Whitehouse return ERR_PTR(-ENAMETOOLONG); 2942ab9cd1cSSteven Whitehouse 2952ab9cd1cSSteven Whitehouse if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || 2962ab9cd1cSSteven Whitehouse (name->len == 2 && memcmp(name->name, "..", 2) == 0 && 2972ab9cd1cSSteven Whitehouse dir == sb->s_root->d_inode)) { 2982ab9cd1cSSteven Whitehouse igrab(dir); 2992ab9cd1cSSteven Whitehouse return dir; 3002ab9cd1cSSteven Whitehouse } 3012ab9cd1cSSteven Whitehouse 3022ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { 3032ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); 3042ab9cd1cSSteven Whitehouse if (error) 3052ab9cd1cSSteven Whitehouse return ERR_PTR(error); 3062ab9cd1cSSteven Whitehouse unlock = 1; 3072ab9cd1cSSteven Whitehouse } 3082ab9cd1cSSteven Whitehouse 3092ab9cd1cSSteven Whitehouse if (!is_root) { 31010556cb2SAl Viro error = gfs2_permission(dir, MAY_EXEC); 3112ab9cd1cSSteven Whitehouse if (error) 3122ab9cd1cSSteven Whitehouse goto out; 3132ab9cd1cSSteven Whitehouse } 3142ab9cd1cSSteven Whitehouse 3152ab9cd1cSSteven Whitehouse inode = gfs2_dir_search(dir, name); 3162ab9cd1cSSteven Whitehouse if (IS_ERR(inode)) 3172ab9cd1cSSteven Whitehouse error = PTR_ERR(inode); 3182ab9cd1cSSteven Whitehouse out: 3192ab9cd1cSSteven Whitehouse if (unlock) 3202ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&d_gh); 3212ab9cd1cSSteven Whitehouse if (error == -ENOENT) 3222ab9cd1cSSteven Whitehouse return NULL; 3232ab9cd1cSSteven Whitehouse return inode ? inode : ERR_PTR(error); 3242ab9cd1cSSteven Whitehouse } 3252ab9cd1cSSteven Whitehouse 3262ab9cd1cSSteven Whitehouse /** 3272ab9cd1cSSteven Whitehouse * create_ok - OK to create a new on-disk inode here? 3282ab9cd1cSSteven Whitehouse * @dip: Directory in which dinode is to be created 3292ab9cd1cSSteven Whitehouse * @name: Name of new dinode 3302ab9cd1cSSteven Whitehouse * @mode: 3312ab9cd1cSSteven Whitehouse * 3322ab9cd1cSSteven Whitehouse * Returns: errno 3332ab9cd1cSSteven Whitehouse */ 3342ab9cd1cSSteven Whitehouse 3352ab9cd1cSSteven Whitehouse static int create_ok(struct gfs2_inode *dip, const struct qstr *name, 3362ab9cd1cSSteven Whitehouse unsigned int mode) 3372ab9cd1cSSteven Whitehouse { 3382ab9cd1cSSteven Whitehouse int error; 3392ab9cd1cSSteven Whitehouse 34010556cb2SAl Viro error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); 3412ab9cd1cSSteven Whitehouse if (error) 3422ab9cd1cSSteven Whitehouse return error; 3432ab9cd1cSSteven Whitehouse 3442ab9cd1cSSteven Whitehouse /* Don't create entries in an unlinked directory */ 3452ab9cd1cSSteven Whitehouse if (!dip->i_inode.i_nlink) 3462ab9cd1cSSteven Whitehouse return -ENOENT; 3472ab9cd1cSSteven Whitehouse 3482ab9cd1cSSteven Whitehouse error = gfs2_dir_check(&dip->i_inode, name, NULL); 3492ab9cd1cSSteven Whitehouse switch (error) { 3502ab9cd1cSSteven Whitehouse case -ENOENT: 3512ab9cd1cSSteven Whitehouse error = 0; 3522ab9cd1cSSteven Whitehouse break; 3532ab9cd1cSSteven Whitehouse case 0: 3542ab9cd1cSSteven Whitehouse return -EEXIST; 3552ab9cd1cSSteven Whitehouse default: 3562ab9cd1cSSteven Whitehouse return error; 3572ab9cd1cSSteven Whitehouse } 3582ab9cd1cSSteven Whitehouse 3592ab9cd1cSSteven Whitehouse if (dip->i_entries == (u32)-1) 3602ab9cd1cSSteven Whitehouse return -EFBIG; 3612ab9cd1cSSteven Whitehouse if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) 3622ab9cd1cSSteven Whitehouse return -EMLINK; 3632ab9cd1cSSteven Whitehouse 3642ab9cd1cSSteven Whitehouse return 0; 3652ab9cd1cSSteven Whitehouse } 3662ab9cd1cSSteven Whitehouse 3672ab9cd1cSSteven Whitehouse static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode, 3682ab9cd1cSSteven Whitehouse unsigned int *uid, unsigned int *gid) 3692ab9cd1cSSteven Whitehouse { 3702ab9cd1cSSteven Whitehouse if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && 3712ab9cd1cSSteven Whitehouse (dip->i_inode.i_mode & S_ISUID) && dip->i_inode.i_uid) { 3722ab9cd1cSSteven Whitehouse if (S_ISDIR(*mode)) 3732ab9cd1cSSteven Whitehouse *mode |= S_ISUID; 3742ab9cd1cSSteven Whitehouse else if (dip->i_inode.i_uid != current_fsuid()) 3752ab9cd1cSSteven Whitehouse *mode &= ~07111; 3762ab9cd1cSSteven Whitehouse *uid = dip->i_inode.i_uid; 3772ab9cd1cSSteven Whitehouse } else 3782ab9cd1cSSteven Whitehouse *uid = current_fsuid(); 3792ab9cd1cSSteven Whitehouse 3802ab9cd1cSSteven Whitehouse if (dip->i_inode.i_mode & S_ISGID) { 3812ab9cd1cSSteven Whitehouse if (S_ISDIR(*mode)) 3822ab9cd1cSSteven Whitehouse *mode |= S_ISGID; 3832ab9cd1cSSteven Whitehouse *gid = dip->i_inode.i_gid; 3842ab9cd1cSSteven Whitehouse } else 3852ab9cd1cSSteven Whitehouse *gid = current_fsgid(); 3862ab9cd1cSSteven Whitehouse } 3872ab9cd1cSSteven Whitehouse 3882ab9cd1cSSteven Whitehouse static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation) 3892ab9cd1cSSteven Whitehouse { 3902ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 3912ab9cd1cSSteven Whitehouse int error; 3922ab9cd1cSSteven Whitehouse 3932ab9cd1cSSteven Whitehouse if (gfs2_alloc_get(dip) == NULL) 3942ab9cd1cSSteven Whitehouse return -ENOMEM; 3952ab9cd1cSSteven Whitehouse 3962ab9cd1cSSteven Whitehouse dip->i_alloc->al_requested = RES_DINODE; 3972ab9cd1cSSteven Whitehouse error = gfs2_inplace_reserve(dip); 3982ab9cd1cSSteven Whitehouse if (error) 3992ab9cd1cSSteven Whitehouse goto out; 4002ab9cd1cSSteven Whitehouse 4012ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS, 0); 4022ab9cd1cSSteven Whitehouse if (error) 4032ab9cd1cSSteven Whitehouse goto out_ipreserv; 4042ab9cd1cSSteven Whitehouse 4052ab9cd1cSSteven Whitehouse error = gfs2_alloc_di(dip, no_addr, generation); 4062ab9cd1cSSteven Whitehouse 4072ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 4082ab9cd1cSSteven Whitehouse 4092ab9cd1cSSteven Whitehouse out_ipreserv: 4102ab9cd1cSSteven Whitehouse gfs2_inplace_release(dip); 4112ab9cd1cSSteven Whitehouse out: 4122ab9cd1cSSteven Whitehouse gfs2_alloc_put(dip); 4132ab9cd1cSSteven Whitehouse return error; 4142ab9cd1cSSteven Whitehouse } 4152ab9cd1cSSteven Whitehouse 416f2741d98SSteven Whitehouse static void gfs2_init_dir(struct buffer_head *dibh, 417f2741d98SSteven Whitehouse const struct gfs2_inode *parent) 418e2d0a13bSSteven Whitehouse { 419e2d0a13bSSteven Whitehouse struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; 420e2d0a13bSSteven Whitehouse struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); 421e2d0a13bSSteven Whitehouse 422e2d0a13bSSteven Whitehouse gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); 423e2d0a13bSSteven Whitehouse dent->de_inum = di->di_num; /* already GFS2 endian */ 424e2d0a13bSSteven Whitehouse dent->de_type = cpu_to_be16(DT_DIR); 425e2d0a13bSSteven Whitehouse 426e2d0a13bSSteven Whitehouse dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); 427e2d0a13bSSteven Whitehouse gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); 428e2d0a13bSSteven Whitehouse gfs2_inum_out(parent, dent); 429e2d0a13bSSteven Whitehouse dent->de_type = cpu_to_be16(DT_DIR); 430e2d0a13bSSteven Whitehouse 431e2d0a13bSSteven Whitehouse } 432e2d0a13bSSteven Whitehouse 4332ab9cd1cSSteven Whitehouse /** 4342ab9cd1cSSteven Whitehouse * init_dinode - Fill in a new dinode structure 435f2741d98SSteven Whitehouse * @dip: The directory this inode is being created in 4362ab9cd1cSSteven Whitehouse * @gl: The glock covering the new inode 437f2741d98SSteven Whitehouse * @inum: The inode number 438f2741d98SSteven Whitehouse * @mode: The file permissions 439f2741d98SSteven Whitehouse * @uid: The uid of the new inode 440f2741d98SSteven Whitehouse * @gid: The gid of the new inode 441f2741d98SSteven Whitehouse * @generation: The generation number of the new inode 442f2741d98SSteven Whitehouse * @dev: The device number (if a device node) 443f2741d98SSteven Whitehouse * @symname: The symlink destination (if a symlink) 444f2741d98SSteven Whitehouse * @size: The inode size (ignored for directories) 445f2741d98SSteven Whitehouse * @bhp: The buffer head (returned to caller) 4462ab9cd1cSSteven Whitehouse * 4472ab9cd1cSSteven Whitehouse */ 4482ab9cd1cSSteven Whitehouse 4492ab9cd1cSSteven Whitehouse static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, 4502ab9cd1cSSteven Whitehouse const struct gfs2_inum_host *inum, unsigned int mode, 4512ab9cd1cSSteven Whitehouse unsigned int uid, unsigned int gid, 452160b4026SSteven Whitehouse const u64 *generation, dev_t dev, const char *symname, 453160b4026SSteven Whitehouse unsigned size, struct buffer_head **bhp) 4542ab9cd1cSSteven Whitehouse { 4552ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 4562ab9cd1cSSteven Whitehouse struct gfs2_dinode *di; 4572ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 4582ab9cd1cSSteven Whitehouse struct timespec tv = CURRENT_TIME; 4592ab9cd1cSSteven Whitehouse 4602ab9cd1cSSteven Whitehouse dibh = gfs2_meta_new(gl, inum->no_addr); 4612ab9cd1cSSteven Whitehouse gfs2_trans_add_bh(gl, dibh, 1); 4622ab9cd1cSSteven Whitehouse gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI); 4632ab9cd1cSSteven Whitehouse gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); 4642ab9cd1cSSteven Whitehouse di = (struct gfs2_dinode *)dibh->b_data; 4652ab9cd1cSSteven Whitehouse 4662ab9cd1cSSteven Whitehouse di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino); 4672ab9cd1cSSteven Whitehouse di->di_num.no_addr = cpu_to_be64(inum->no_addr); 4682ab9cd1cSSteven Whitehouse di->di_mode = cpu_to_be32(mode); 4692ab9cd1cSSteven Whitehouse di->di_uid = cpu_to_be32(uid); 4702ab9cd1cSSteven Whitehouse di->di_gid = cpu_to_be32(gid); 4712ab9cd1cSSteven Whitehouse di->di_nlink = 0; 472160b4026SSteven Whitehouse di->di_size = cpu_to_be64(size); 4732ab9cd1cSSteven Whitehouse di->di_blocks = cpu_to_be64(1); 4742ab9cd1cSSteven Whitehouse di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(tv.tv_sec); 4752ab9cd1cSSteven Whitehouse di->di_major = cpu_to_be32(MAJOR(dev)); 4762ab9cd1cSSteven Whitehouse di->di_minor = cpu_to_be32(MINOR(dev)); 4772ab9cd1cSSteven Whitehouse di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr); 4782ab9cd1cSSteven Whitehouse di->di_generation = cpu_to_be64(*generation); 4792ab9cd1cSSteven Whitehouse di->di_flags = 0; 4802ab9cd1cSSteven Whitehouse di->__pad1 = 0; 4812ab9cd1cSSteven Whitehouse di->di_payload_format = cpu_to_be32(S_ISDIR(mode) ? GFS2_FORMAT_DE : 0); 4822ab9cd1cSSteven Whitehouse di->di_height = 0; 4832ab9cd1cSSteven Whitehouse di->__pad2 = 0; 4842ab9cd1cSSteven Whitehouse di->__pad3 = 0; 4852ab9cd1cSSteven Whitehouse di->di_depth = 0; 4862ab9cd1cSSteven Whitehouse di->di_entries = 0; 4872ab9cd1cSSteven Whitehouse memset(&di->__pad4, 0, sizeof(di->__pad4)); 4882ab9cd1cSSteven Whitehouse di->di_eattr = 0; 4892ab9cd1cSSteven Whitehouse di->di_atime_nsec = cpu_to_be32(tv.tv_nsec); 4902ab9cd1cSSteven Whitehouse di->di_mtime_nsec = cpu_to_be32(tv.tv_nsec); 4912ab9cd1cSSteven Whitehouse di->di_ctime_nsec = cpu_to_be32(tv.tv_nsec); 4922ab9cd1cSSteven Whitehouse memset(&di->di_reserved, 0, sizeof(di->di_reserved)); 4932ab9cd1cSSteven Whitehouse 494160b4026SSteven Whitehouse switch(mode & S_IFMT) { 495160b4026SSteven Whitehouse case S_IFREG: 496e2d0a13bSSteven Whitehouse if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || 497e2d0a13bSSteven Whitehouse gfs2_tune_get(sdp, gt_new_files_jdata)) 498e2d0a13bSSteven Whitehouse di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA); 499160b4026SSteven Whitehouse break; 500160b4026SSteven Whitehouse case S_IFDIR: 501e2d0a13bSSteven Whitehouse di->di_flags |= cpu_to_be32(dip->i_diskflags & 502e2d0a13bSSteven Whitehouse GFS2_DIF_INHERIT_JDATA); 503e2d0a13bSSteven Whitehouse di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA); 504e2d0a13bSSteven Whitehouse di->di_size = cpu_to_be64(sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode)); 505e2d0a13bSSteven Whitehouse di->di_entries = cpu_to_be32(2); 506e2d0a13bSSteven Whitehouse gfs2_init_dir(dibh, dip); 507160b4026SSteven Whitehouse break; 508160b4026SSteven Whitehouse case S_IFLNK: 509160b4026SSteven Whitehouse memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, size); 510160b4026SSteven Whitehouse break; 511e2d0a13bSSteven Whitehouse } 512e2d0a13bSSteven Whitehouse 5132ab9cd1cSSteven Whitehouse set_buffer_uptodate(dibh); 5142ab9cd1cSSteven Whitehouse 5152ab9cd1cSSteven Whitehouse *bhp = dibh; 5162ab9cd1cSSteven Whitehouse } 5172ab9cd1cSSteven Whitehouse 5182ab9cd1cSSteven Whitehouse static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, 5192ab9cd1cSSteven Whitehouse unsigned int mode, const struct gfs2_inum_host *inum, 520160b4026SSteven Whitehouse const u64 *generation, dev_t dev, const char *symname, 521160b4026SSteven Whitehouse unsigned int size, struct buffer_head **bhp) 5222ab9cd1cSSteven Whitehouse { 5232ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 5242ab9cd1cSSteven Whitehouse unsigned int uid, gid; 5252ab9cd1cSSteven Whitehouse int error; 5262ab9cd1cSSteven Whitehouse 5272ab9cd1cSSteven Whitehouse munge_mode_uid_gid(dip, &mode, &uid, &gid); 5282ab9cd1cSSteven Whitehouse if (!gfs2_alloc_get(dip)) 5292ab9cd1cSSteven Whitehouse return -ENOMEM; 5302ab9cd1cSSteven Whitehouse 5312ab9cd1cSSteven Whitehouse error = gfs2_quota_lock(dip, uid, gid); 5322ab9cd1cSSteven Whitehouse if (error) 5332ab9cd1cSSteven Whitehouse goto out; 5342ab9cd1cSSteven Whitehouse 5352ab9cd1cSSteven Whitehouse error = gfs2_quota_check(dip, uid, gid); 5362ab9cd1cSSteven Whitehouse if (error) 5372ab9cd1cSSteven Whitehouse goto out_quota; 5382ab9cd1cSSteven Whitehouse 5392ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_DINODE + RES_QUOTA, 0); 5402ab9cd1cSSteven Whitehouse if (error) 5412ab9cd1cSSteven Whitehouse goto out_quota; 5422ab9cd1cSSteven Whitehouse 543160b4026SSteven Whitehouse init_dinode(dip, gl, inum, mode, uid, gid, generation, dev, symname, size, bhp); 5442ab9cd1cSSteven Whitehouse gfs2_quota_change(dip, +1, uid, gid); 5452ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 5462ab9cd1cSSteven Whitehouse 5472ab9cd1cSSteven Whitehouse out_quota: 5482ab9cd1cSSteven Whitehouse gfs2_quota_unlock(dip); 5492ab9cd1cSSteven Whitehouse out: 5502ab9cd1cSSteven Whitehouse gfs2_alloc_put(dip); 5512ab9cd1cSSteven Whitehouse return error; 5522ab9cd1cSSteven Whitehouse } 5532ab9cd1cSSteven Whitehouse 5542ab9cd1cSSteven Whitehouse static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, 5552ab9cd1cSSteven Whitehouse struct gfs2_inode *ip) 5562ab9cd1cSSteven Whitehouse { 5572ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 5582ab9cd1cSSteven Whitehouse struct gfs2_alloc *al; 5592ab9cd1cSSteven Whitehouse int alloc_required; 5602ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 5612ab9cd1cSSteven Whitehouse int error; 5622ab9cd1cSSteven Whitehouse 5632ab9cd1cSSteven Whitehouse al = gfs2_alloc_get(dip); 5642ab9cd1cSSteven Whitehouse if (!al) 5652ab9cd1cSSteven Whitehouse return -ENOMEM; 5662ab9cd1cSSteven Whitehouse 5672ab9cd1cSSteven Whitehouse error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); 5682ab9cd1cSSteven Whitehouse if (error) 5692ab9cd1cSSteven Whitehouse goto fail; 5702ab9cd1cSSteven Whitehouse 5712ab9cd1cSSteven Whitehouse error = alloc_required = gfs2_diradd_alloc_required(&dip->i_inode, name); 5722ab9cd1cSSteven Whitehouse if (alloc_required < 0) 5732ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5742ab9cd1cSSteven Whitehouse if (alloc_required) { 5752ab9cd1cSSteven Whitehouse error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_gid); 5762ab9cd1cSSteven Whitehouse if (error) 5772ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5782ab9cd1cSSteven Whitehouse 5792ab9cd1cSSteven Whitehouse al->al_requested = sdp->sd_max_dirres; 5802ab9cd1cSSteven Whitehouse 5812ab9cd1cSSteven Whitehouse error = gfs2_inplace_reserve(dip); 5822ab9cd1cSSteven Whitehouse if (error) 5832ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5842ab9cd1cSSteven Whitehouse 5852ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + 5862ab9cd1cSSteven Whitehouse al->al_rgd->rd_length + 5872ab9cd1cSSteven Whitehouse 2 * RES_DINODE + 5882ab9cd1cSSteven Whitehouse RES_STATFS + RES_QUOTA, 0); 5892ab9cd1cSSteven Whitehouse if (error) 5902ab9cd1cSSteven Whitehouse goto fail_ipreserv; 5912ab9cd1cSSteven Whitehouse } else { 5922ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); 5932ab9cd1cSSteven Whitehouse if (error) 5942ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5952ab9cd1cSSteven Whitehouse } 5962ab9cd1cSSteven Whitehouse 5972ab9cd1cSSteven Whitehouse error = gfs2_dir_add(&dip->i_inode, name, ip); 5982ab9cd1cSSteven Whitehouse if (error) 5992ab9cd1cSSteven Whitehouse goto fail_end_trans; 6002ab9cd1cSSteven Whitehouse 6012ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 6022ab9cd1cSSteven Whitehouse if (error) 6032ab9cd1cSSteven Whitehouse goto fail_end_trans; 604e2d0a13bSSteven Whitehouse inc_nlink(&ip->i_inode); 605e2d0a13bSSteven Whitehouse if (S_ISDIR(ip->i_inode.i_mode)) 606e2d0a13bSSteven Whitehouse inc_nlink(&ip->i_inode); 6072ab9cd1cSSteven Whitehouse gfs2_trans_add_bh(ip->i_gl, dibh, 1); 6082ab9cd1cSSteven Whitehouse gfs2_dinode_out(ip, dibh->b_data); 6092ab9cd1cSSteven Whitehouse brelse(dibh); 6102ab9cd1cSSteven Whitehouse return 0; 6112ab9cd1cSSteven Whitehouse 6122ab9cd1cSSteven Whitehouse fail_end_trans: 6132ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 6142ab9cd1cSSteven Whitehouse 6152ab9cd1cSSteven Whitehouse fail_ipreserv: 6162ab9cd1cSSteven Whitehouse if (dip->i_alloc->al_rgd) 6172ab9cd1cSSteven Whitehouse gfs2_inplace_release(dip); 6182ab9cd1cSSteven Whitehouse 6192ab9cd1cSSteven Whitehouse fail_quota_locks: 6202ab9cd1cSSteven Whitehouse gfs2_quota_unlock(dip); 6212ab9cd1cSSteven Whitehouse 6222ab9cd1cSSteven Whitehouse fail: 6232ab9cd1cSSteven Whitehouse gfs2_alloc_put(dip); 6242ab9cd1cSSteven Whitehouse return error; 6252ab9cd1cSSteven Whitehouse } 6262ab9cd1cSSteven Whitehouse 6272ab9cd1cSSteven Whitehouse static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip, 6282ab9cd1cSSteven Whitehouse const struct qstr *qstr) 6292ab9cd1cSSteven Whitehouse { 6302ab9cd1cSSteven Whitehouse int err; 6312ab9cd1cSSteven Whitehouse size_t len; 6322ab9cd1cSSteven Whitehouse void *value; 6332ab9cd1cSSteven Whitehouse char *name; 6342ab9cd1cSSteven Whitehouse 6352ab9cd1cSSteven Whitehouse err = security_inode_init_security(&ip->i_inode, &dip->i_inode, qstr, 6362ab9cd1cSSteven Whitehouse &name, &value, &len); 6372ab9cd1cSSteven Whitehouse 6382ab9cd1cSSteven Whitehouse if (err) { 6392ab9cd1cSSteven Whitehouse if (err == -EOPNOTSUPP) 6402ab9cd1cSSteven Whitehouse return 0; 6412ab9cd1cSSteven Whitehouse return err; 6422ab9cd1cSSteven Whitehouse } 6432ab9cd1cSSteven Whitehouse 6442ab9cd1cSSteven Whitehouse err = __gfs2_xattr_set(&ip->i_inode, name, value, len, 0, 6452ab9cd1cSSteven Whitehouse GFS2_EATYPE_SECURITY); 6462ab9cd1cSSteven Whitehouse kfree(value); 6472ab9cd1cSSteven Whitehouse kfree(name); 6482ab9cd1cSSteven Whitehouse 6492ab9cd1cSSteven Whitehouse return err; 6502ab9cd1cSSteven Whitehouse } 6512ab9cd1cSSteven Whitehouse 6522ab9cd1cSSteven Whitehouse /** 653f2741d98SSteven Whitehouse * gfs2_create_inode - Create a new inode 654f2741d98SSteven Whitehouse * @dir: The parent directory 655f2741d98SSteven Whitehouse * @dentry: The new dentry 656f2741d98SSteven Whitehouse * @mode: The permissions on the new inode 657f2741d98SSteven Whitehouse * @dev: For device nodes, this is the device number 658f2741d98SSteven Whitehouse * @symname: For symlinks, this is the link destination 659f2741d98SSteven Whitehouse * @size: The initial size of the inode (ignored for directories) 6602ab9cd1cSSteven Whitehouse * 661f2741d98SSteven Whitehouse * Returns: 0 on success, or error code 6622ab9cd1cSSteven Whitehouse */ 6632ab9cd1cSSteven Whitehouse 664f2741d98SSteven Whitehouse static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, 665f2741d98SSteven Whitehouse unsigned int mode, dev_t dev, const char *symname, 666160b4026SSteven Whitehouse unsigned int size) 6672ab9cd1cSSteven Whitehouse { 668f2741d98SSteven Whitehouse const struct qstr *name = &dentry->d_name; 669f2741d98SSteven Whitehouse struct gfs2_holder ghs[2]; 6702ab9cd1cSSteven Whitehouse struct inode *inode = NULL; 671f2741d98SSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 6722ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 6732ab9cd1cSSteven Whitehouse struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 }; 6742ab9cd1cSSteven Whitehouse int error; 6752ab9cd1cSSteven Whitehouse u64 generation; 6762ab9cd1cSSteven Whitehouse struct buffer_head *bh = NULL; 6772ab9cd1cSSteven Whitehouse 6782ab9cd1cSSteven Whitehouse if (!name->len || name->len > GFS2_FNAMESIZE) 679f2741d98SSteven Whitehouse return -ENAMETOOLONG; 6802ab9cd1cSSteven Whitehouse 681f2741d98SSteven Whitehouse error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 6822ab9cd1cSSteven Whitehouse if (error) 6832ab9cd1cSSteven Whitehouse goto fail; 6842ab9cd1cSSteven Whitehouse 6852ab9cd1cSSteven Whitehouse error = create_ok(dip, name, mode); 6862ab9cd1cSSteven Whitehouse if (error) 6872ab9cd1cSSteven Whitehouse goto fail_gunlock; 6882ab9cd1cSSteven Whitehouse 6892ab9cd1cSSteven Whitehouse error = alloc_dinode(dip, &inum.no_addr, &generation); 6902ab9cd1cSSteven Whitehouse if (error) 6912ab9cd1cSSteven Whitehouse goto fail_gunlock; 6922ab9cd1cSSteven Whitehouse inum.no_formal_ino = generation; 6932ab9cd1cSSteven Whitehouse 6942ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops, 6952ab9cd1cSSteven Whitehouse LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); 6962ab9cd1cSSteven Whitehouse if (error) 6972ab9cd1cSSteven Whitehouse goto fail_gunlock; 6982ab9cd1cSSteven Whitehouse 699160b4026SSteven Whitehouse error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev, symname, size, &bh); 7002ab9cd1cSSteven Whitehouse if (error) 7012ab9cd1cSSteven Whitehouse goto fail_gunlock2; 7022ab9cd1cSSteven Whitehouse 7032ab9cd1cSSteven Whitehouse inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode), inum.no_addr, 7042ab9cd1cSSteven Whitehouse inum.no_formal_ino, 0); 7052ab9cd1cSSteven Whitehouse if (IS_ERR(inode)) 7062ab9cd1cSSteven Whitehouse goto fail_gunlock2; 7072ab9cd1cSSteven Whitehouse 7082ab9cd1cSSteven Whitehouse error = gfs2_inode_refresh(GFS2_I(inode)); 7092ab9cd1cSSteven Whitehouse if (error) 7102ab9cd1cSSteven Whitehouse goto fail_gunlock2; 7112ab9cd1cSSteven Whitehouse 7122ab9cd1cSSteven Whitehouse error = gfs2_acl_create(dip, inode); 7132ab9cd1cSSteven Whitehouse if (error) 7142ab9cd1cSSteven Whitehouse goto fail_gunlock2; 7152ab9cd1cSSteven Whitehouse 7162ab9cd1cSSteven Whitehouse error = gfs2_security_init(dip, GFS2_I(inode), name); 7172ab9cd1cSSteven Whitehouse if (error) 7182ab9cd1cSSteven Whitehouse goto fail_gunlock2; 7192ab9cd1cSSteven Whitehouse 7202ab9cd1cSSteven Whitehouse error = link_dinode(dip, name, GFS2_I(inode)); 7212ab9cd1cSSteven Whitehouse if (error) 7222ab9cd1cSSteven Whitehouse goto fail_gunlock2; 7232ab9cd1cSSteven Whitehouse 7242ab9cd1cSSteven Whitehouse if (bh) 7252ab9cd1cSSteven Whitehouse brelse(bh); 726f2741d98SSteven Whitehouse 727f2741d98SSteven Whitehouse gfs2_trans_end(sdp); 728f2741d98SSteven Whitehouse if (dip->i_alloc->al_rgd) 729f2741d98SSteven Whitehouse gfs2_inplace_release(dip); 730f2741d98SSteven Whitehouse gfs2_quota_unlock(dip); 731f2741d98SSteven Whitehouse gfs2_alloc_put(dip); 732f2741d98SSteven Whitehouse gfs2_glock_dq_uninit_m(2, ghs); 733f2741d98SSteven Whitehouse mark_inode_dirty(inode); 734f2741d98SSteven Whitehouse d_instantiate(dentry, inode); 735f2741d98SSteven Whitehouse return 0; 7362ab9cd1cSSteven Whitehouse 7372ab9cd1cSSteven Whitehouse fail_gunlock2: 7382ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(ghs + 1); 7392ab9cd1cSSteven Whitehouse fail_gunlock: 740f2741d98SSteven Whitehouse gfs2_glock_dq_uninit(ghs); 741*40ac218fSSteven Whitehouse if (inode && !IS_ERR(inode)) { 742*40ac218fSSteven Whitehouse set_bit(GIF_ALLOC_FAILED, &GFS2_I(inode)->i_flags); 743*40ac218fSSteven Whitehouse iput(inode); 744*40ac218fSSteven Whitehouse } 7452ab9cd1cSSteven Whitehouse fail: 7462ab9cd1cSSteven Whitehouse if (bh) 7472ab9cd1cSSteven Whitehouse brelse(bh); 748f2741d98SSteven Whitehouse return error; 7492ab9cd1cSSteven Whitehouse } 750f2741d98SSteven Whitehouse 7512ab9cd1cSSteven Whitehouse /** 7522ab9cd1cSSteven Whitehouse * gfs2_create - Create a file 7532ab9cd1cSSteven Whitehouse * @dir: The directory in which to create the file 7542ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new file 7552ab9cd1cSSteven Whitehouse * @mode: The mode of the new file 7562ab9cd1cSSteven Whitehouse * 7572ab9cd1cSSteven Whitehouse * Returns: errno 7582ab9cd1cSSteven Whitehouse */ 7592ab9cd1cSSteven Whitehouse 7602ab9cd1cSSteven Whitehouse static int gfs2_create(struct inode *dir, struct dentry *dentry, 7612ab9cd1cSSteven Whitehouse int mode, struct nameidata *nd) 7622ab9cd1cSSteven Whitehouse { 7632ab9cd1cSSteven Whitehouse struct inode *inode; 764f2741d98SSteven Whitehouse int ret; 7652ab9cd1cSSteven Whitehouse 7662ab9cd1cSSteven Whitehouse for (;;) { 767f2741d98SSteven Whitehouse ret = gfs2_create_inode(dir, dentry, S_IFREG | mode, 0, NULL, 0); 768f2741d98SSteven Whitehouse if (ret != -EEXIST || (nd && (nd->flags & LOOKUP_EXCL))) 769f2741d98SSteven Whitehouse return ret; 7702ab9cd1cSSteven Whitehouse 7712ab9cd1cSSteven Whitehouse inode = gfs2_lookupi(dir, &dentry->d_name, 0); 7722ab9cd1cSSteven Whitehouse if (inode) { 773f2741d98SSteven Whitehouse if (!IS_ERR(inode)) 7742ab9cd1cSSteven Whitehouse break; 7752ab9cd1cSSteven Whitehouse return PTR_ERR(inode); 7762ab9cd1cSSteven Whitehouse } 7772ab9cd1cSSteven Whitehouse } 7782ab9cd1cSSteven Whitehouse 7792ab9cd1cSSteven Whitehouse d_instantiate(dentry, inode); 7802ab9cd1cSSteven Whitehouse return 0; 7812ab9cd1cSSteven Whitehouse } 7822ab9cd1cSSteven Whitehouse 7832ab9cd1cSSteven Whitehouse /** 7842ab9cd1cSSteven Whitehouse * gfs2_lookup - Look up a filename in a directory and return its inode 7852ab9cd1cSSteven Whitehouse * @dir: The directory inode 7862ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new inode 7872ab9cd1cSSteven Whitehouse * @nd: passed from Linux VFS, ignored by us 7882ab9cd1cSSteven Whitehouse * 7892ab9cd1cSSteven Whitehouse * Called by the VFS layer. Lock dir and call gfs2_lookupi() 7902ab9cd1cSSteven Whitehouse * 7912ab9cd1cSSteven Whitehouse * Returns: errno 7922ab9cd1cSSteven Whitehouse */ 7932ab9cd1cSSteven Whitehouse 7942ab9cd1cSSteven Whitehouse static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, 7952ab9cd1cSSteven Whitehouse struct nameidata *nd) 7962ab9cd1cSSteven Whitehouse { 7976c673ab3SAl Viro struct inode *inode = gfs2_lookupi(dir, &dentry->d_name, 0); 7986c673ab3SAl Viro if (inode && !IS_ERR(inode)) { 7992ab9cd1cSSteven Whitehouse struct gfs2_glock *gl = GFS2_I(inode)->i_gl; 8002ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 8012ab9cd1cSSteven Whitehouse int error; 8022ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 8032ab9cd1cSSteven Whitehouse if (error) { 8042ab9cd1cSSteven Whitehouse iput(inode); 8052ab9cd1cSSteven Whitehouse return ERR_PTR(error); 8062ab9cd1cSSteven Whitehouse } 8072ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 8082ab9cd1cSSteven Whitehouse } 8096c673ab3SAl Viro return d_splice_alias(inode, dentry); 8102ab9cd1cSSteven Whitehouse } 8112ab9cd1cSSteven Whitehouse 8122ab9cd1cSSteven Whitehouse /** 8132ab9cd1cSSteven Whitehouse * gfs2_link - Link to a file 8142ab9cd1cSSteven Whitehouse * @old_dentry: The inode to link 8152ab9cd1cSSteven Whitehouse * @dir: Add link to this directory 8162ab9cd1cSSteven Whitehouse * @dentry: The name of the link 8172ab9cd1cSSteven Whitehouse * 8182ab9cd1cSSteven Whitehouse * Link the inode in "old_dentry" into the directory "dir" with the 8192ab9cd1cSSteven Whitehouse * name in "dentry". 8202ab9cd1cSSteven Whitehouse * 8212ab9cd1cSSteven Whitehouse * Returns: errno 8222ab9cd1cSSteven Whitehouse */ 8232ab9cd1cSSteven Whitehouse 8242ab9cd1cSSteven Whitehouse static int gfs2_link(struct dentry *old_dentry, struct inode *dir, 8252ab9cd1cSSteven Whitehouse struct dentry *dentry) 8262ab9cd1cSSteven Whitehouse { 8272ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 8282ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 8292ab9cd1cSSteven Whitehouse struct inode *inode = old_dentry->d_inode; 8302ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 8312ab9cd1cSSteven Whitehouse struct gfs2_holder ghs[2]; 8322ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 8332ab9cd1cSSteven Whitehouse int alloc_required; 8342ab9cd1cSSteven Whitehouse int error; 8352ab9cd1cSSteven Whitehouse 8362ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) 8372ab9cd1cSSteven Whitehouse return -EPERM; 8382ab9cd1cSSteven Whitehouse 8392ab9cd1cSSteven Whitehouse gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 8402ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 8412ab9cd1cSSteven Whitehouse 8422ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs); /* parent */ 8432ab9cd1cSSteven Whitehouse if (error) 8442ab9cd1cSSteven Whitehouse goto out_parent; 8452ab9cd1cSSteven Whitehouse 8462ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 1); /* child */ 8472ab9cd1cSSteven Whitehouse if (error) 8482ab9cd1cSSteven Whitehouse goto out_child; 8492ab9cd1cSSteven Whitehouse 8502ab9cd1cSSteven Whitehouse error = -ENOENT; 8512ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 8522ab9cd1cSSteven Whitehouse goto out_gunlock; 8532ab9cd1cSSteven Whitehouse 85410556cb2SAl Viro error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); 8552ab9cd1cSSteven Whitehouse if (error) 8562ab9cd1cSSteven Whitehouse goto out_gunlock; 8572ab9cd1cSSteven Whitehouse 8582ab9cd1cSSteven Whitehouse error = gfs2_dir_check(dir, &dentry->d_name, NULL); 8592ab9cd1cSSteven Whitehouse switch (error) { 8602ab9cd1cSSteven Whitehouse case -ENOENT: 8612ab9cd1cSSteven Whitehouse break; 8622ab9cd1cSSteven Whitehouse case 0: 8632ab9cd1cSSteven Whitehouse error = -EEXIST; 8642ab9cd1cSSteven Whitehouse default: 8652ab9cd1cSSteven Whitehouse goto out_gunlock; 8662ab9cd1cSSteven Whitehouse } 8672ab9cd1cSSteven Whitehouse 8682ab9cd1cSSteven Whitehouse error = -EINVAL; 8692ab9cd1cSSteven Whitehouse if (!dip->i_inode.i_nlink) 8702ab9cd1cSSteven Whitehouse goto out_gunlock; 8712ab9cd1cSSteven Whitehouse error = -EFBIG; 8722ab9cd1cSSteven Whitehouse if (dip->i_entries == (u32)-1) 8732ab9cd1cSSteven Whitehouse goto out_gunlock; 8742ab9cd1cSSteven Whitehouse error = -EPERM; 8752ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 8762ab9cd1cSSteven Whitehouse goto out_gunlock; 8772ab9cd1cSSteven Whitehouse error = -EINVAL; 8782ab9cd1cSSteven Whitehouse if (!ip->i_inode.i_nlink) 8792ab9cd1cSSteven Whitehouse goto out_gunlock; 8802ab9cd1cSSteven Whitehouse error = -EMLINK; 8812ab9cd1cSSteven Whitehouse if (ip->i_inode.i_nlink == (u32)-1) 8822ab9cd1cSSteven Whitehouse goto out_gunlock; 8832ab9cd1cSSteven Whitehouse 8842ab9cd1cSSteven Whitehouse alloc_required = error = gfs2_diradd_alloc_required(dir, &dentry->d_name); 8852ab9cd1cSSteven Whitehouse if (error < 0) 8862ab9cd1cSSteven Whitehouse goto out_gunlock; 8872ab9cd1cSSteven Whitehouse error = 0; 8882ab9cd1cSSteven Whitehouse 8892ab9cd1cSSteven Whitehouse if (alloc_required) { 8902ab9cd1cSSteven Whitehouse struct gfs2_alloc *al = gfs2_alloc_get(dip); 8912ab9cd1cSSteven Whitehouse if (!al) { 8922ab9cd1cSSteven Whitehouse error = -ENOMEM; 8932ab9cd1cSSteven Whitehouse goto out_gunlock; 8942ab9cd1cSSteven Whitehouse } 8952ab9cd1cSSteven Whitehouse 8962ab9cd1cSSteven Whitehouse error = gfs2_quota_lock_check(dip); 8972ab9cd1cSSteven Whitehouse if (error) 8982ab9cd1cSSteven Whitehouse goto out_alloc; 8992ab9cd1cSSteven Whitehouse 9002ab9cd1cSSteven Whitehouse al->al_requested = sdp->sd_max_dirres; 9012ab9cd1cSSteven Whitehouse 9022ab9cd1cSSteven Whitehouse error = gfs2_inplace_reserve(dip); 9032ab9cd1cSSteven Whitehouse if (error) 9042ab9cd1cSSteven Whitehouse goto out_gunlock_q; 9052ab9cd1cSSteven Whitehouse 9062ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + 9072ab9cd1cSSteven Whitehouse gfs2_rg_blocks(al) + 9082ab9cd1cSSteven Whitehouse 2 * RES_DINODE + RES_STATFS + 9092ab9cd1cSSteven Whitehouse RES_QUOTA, 0); 9102ab9cd1cSSteven Whitehouse if (error) 9112ab9cd1cSSteven Whitehouse goto out_ipres; 9122ab9cd1cSSteven Whitehouse } else { 9132ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); 9142ab9cd1cSSteven Whitehouse if (error) 9152ab9cd1cSSteven Whitehouse goto out_ipres; 9162ab9cd1cSSteven Whitehouse } 9172ab9cd1cSSteven Whitehouse 9182ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 9192ab9cd1cSSteven Whitehouse if (error) 9202ab9cd1cSSteven Whitehouse goto out_end_trans; 9212ab9cd1cSSteven Whitehouse 9222ab9cd1cSSteven Whitehouse error = gfs2_dir_add(dir, &dentry->d_name, ip); 9232ab9cd1cSSteven Whitehouse if (error) 9242ab9cd1cSSteven Whitehouse goto out_brelse; 9252ab9cd1cSSteven Whitehouse 9262ab9cd1cSSteven Whitehouse gfs2_trans_add_bh(ip->i_gl, dibh, 1); 9272ab9cd1cSSteven Whitehouse inc_nlink(&ip->i_inode); 9282ab9cd1cSSteven Whitehouse ip->i_inode.i_ctime = CURRENT_TIME; 9292ab9cd1cSSteven Whitehouse gfs2_dinode_out(ip, dibh->b_data); 9302ab9cd1cSSteven Whitehouse mark_inode_dirty(&ip->i_inode); 9312ab9cd1cSSteven Whitehouse 9322ab9cd1cSSteven Whitehouse out_brelse: 9332ab9cd1cSSteven Whitehouse brelse(dibh); 9342ab9cd1cSSteven Whitehouse out_end_trans: 9352ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 9362ab9cd1cSSteven Whitehouse out_ipres: 9372ab9cd1cSSteven Whitehouse if (alloc_required) 9382ab9cd1cSSteven Whitehouse gfs2_inplace_release(dip); 9392ab9cd1cSSteven Whitehouse out_gunlock_q: 9402ab9cd1cSSteven Whitehouse if (alloc_required) 9412ab9cd1cSSteven Whitehouse gfs2_quota_unlock(dip); 9422ab9cd1cSSteven Whitehouse out_alloc: 9432ab9cd1cSSteven Whitehouse if (alloc_required) 9442ab9cd1cSSteven Whitehouse gfs2_alloc_put(dip); 9452ab9cd1cSSteven Whitehouse out_gunlock: 9462ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 1); 9472ab9cd1cSSteven Whitehouse out_child: 9482ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs); 9492ab9cd1cSSteven Whitehouse out_parent: 9502ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs); 9512ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs + 1); 9522ab9cd1cSSteven Whitehouse if (!error) { 9532ab9cd1cSSteven Whitehouse ihold(inode); 9542ab9cd1cSSteven Whitehouse d_instantiate(dentry, inode); 9552ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 9562ab9cd1cSSteven Whitehouse } 9572ab9cd1cSSteven Whitehouse return error; 9582ab9cd1cSSteven Whitehouse } 9592ab9cd1cSSteven Whitehouse 9602ab9cd1cSSteven Whitehouse /* 9612ab9cd1cSSteven Whitehouse * gfs2_unlink_ok - check to see that a inode is still in a directory 9622ab9cd1cSSteven Whitehouse * @dip: the directory 9632ab9cd1cSSteven Whitehouse * @name: the name of the file 9642ab9cd1cSSteven Whitehouse * @ip: the inode 9652ab9cd1cSSteven Whitehouse * 9662ab9cd1cSSteven Whitehouse * Assumes that the lock on (at least) @dip is held. 9672ab9cd1cSSteven Whitehouse * 9682ab9cd1cSSteven Whitehouse * Returns: 0 if the parent/child relationship is correct, errno if it isn't 9692ab9cd1cSSteven Whitehouse */ 9702ab9cd1cSSteven Whitehouse 9712ab9cd1cSSteven Whitehouse static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, 9722ab9cd1cSSteven Whitehouse const struct gfs2_inode *ip) 9732ab9cd1cSSteven Whitehouse { 9742ab9cd1cSSteven Whitehouse int error; 9752ab9cd1cSSteven Whitehouse 9762ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) 9772ab9cd1cSSteven Whitehouse return -EPERM; 9782ab9cd1cSSteven Whitehouse 9792ab9cd1cSSteven Whitehouse if ((dip->i_inode.i_mode & S_ISVTX) && 9802ab9cd1cSSteven Whitehouse dip->i_inode.i_uid != current_fsuid() && 9812ab9cd1cSSteven Whitehouse ip->i_inode.i_uid != current_fsuid() && !capable(CAP_FOWNER)) 9822ab9cd1cSSteven Whitehouse return -EPERM; 9832ab9cd1cSSteven Whitehouse 9842ab9cd1cSSteven Whitehouse if (IS_APPEND(&dip->i_inode)) 9852ab9cd1cSSteven Whitehouse return -EPERM; 9862ab9cd1cSSteven Whitehouse 98710556cb2SAl Viro error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); 9882ab9cd1cSSteven Whitehouse if (error) 9892ab9cd1cSSteven Whitehouse return error; 9902ab9cd1cSSteven Whitehouse 9912ab9cd1cSSteven Whitehouse error = gfs2_dir_check(&dip->i_inode, name, ip); 9922ab9cd1cSSteven Whitehouse if (error) 9932ab9cd1cSSteven Whitehouse return error; 9942ab9cd1cSSteven Whitehouse 9952ab9cd1cSSteven Whitehouse return 0; 9962ab9cd1cSSteven Whitehouse } 9972ab9cd1cSSteven Whitehouse 9982ab9cd1cSSteven Whitehouse /** 9992ab9cd1cSSteven Whitehouse * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it 10002ab9cd1cSSteven Whitehouse * @dip: The parent directory 10012ab9cd1cSSteven Whitehouse * @name: The name of the entry in the parent directory 10022ab9cd1cSSteven Whitehouse * @bh: The inode buffer for the inode to be removed 10032ab9cd1cSSteven Whitehouse * @inode: The inode to be removed 10042ab9cd1cSSteven Whitehouse * 10052ab9cd1cSSteven Whitehouse * Called with all the locks and in a transaction. This will only be 10062ab9cd1cSSteven Whitehouse * called for a directory after it has been checked to ensure it is empty. 10072ab9cd1cSSteven Whitehouse * 10082ab9cd1cSSteven Whitehouse * Returns: 0 on success, or an error 10092ab9cd1cSSteven Whitehouse */ 10102ab9cd1cSSteven Whitehouse 10112ab9cd1cSSteven Whitehouse static int gfs2_unlink_inode(struct gfs2_inode *dip, 10122ab9cd1cSSteven Whitehouse const struct dentry *dentry, 10132ab9cd1cSSteven Whitehouse struct buffer_head *bh) 10142ab9cd1cSSteven Whitehouse { 10152ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 10162ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 10172ab9cd1cSSteven Whitehouse int error; 10182ab9cd1cSSteven Whitehouse 10192ab9cd1cSSteven Whitehouse error = gfs2_dir_del(dip, dentry); 10202ab9cd1cSSteven Whitehouse if (error) 10212ab9cd1cSSteven Whitehouse return error; 10222ab9cd1cSSteven Whitehouse 10232ab9cd1cSSteven Whitehouse ip->i_entries = 0; 10242ab9cd1cSSteven Whitehouse inode->i_ctime = CURRENT_TIME; 10252ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) 10262ab9cd1cSSteven Whitehouse clear_nlink(inode); 10272ab9cd1cSSteven Whitehouse else 10282ab9cd1cSSteven Whitehouse drop_nlink(inode); 10292ab9cd1cSSteven Whitehouse gfs2_trans_add_bh(ip->i_gl, bh, 1); 10302ab9cd1cSSteven Whitehouse gfs2_dinode_out(ip, bh->b_data); 10312ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 10322ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 10332ab9cd1cSSteven Whitehouse gfs2_unlink_di(inode); 10342ab9cd1cSSteven Whitehouse return 0; 10352ab9cd1cSSteven Whitehouse } 10362ab9cd1cSSteven Whitehouse 10372ab9cd1cSSteven Whitehouse 10382ab9cd1cSSteven Whitehouse /** 10392ab9cd1cSSteven Whitehouse * gfs2_unlink - Unlink an inode (this does rmdir as well) 10402ab9cd1cSSteven Whitehouse * @dir: The inode of the directory containing the inode to unlink 10412ab9cd1cSSteven Whitehouse * @dentry: The file itself 10422ab9cd1cSSteven Whitehouse * 10432ab9cd1cSSteven Whitehouse * This routine uses the type of the inode as a flag to figure out 10442ab9cd1cSSteven Whitehouse * whether this is an unlink or an rmdir. 10452ab9cd1cSSteven Whitehouse * 10462ab9cd1cSSteven Whitehouse * Returns: errno 10472ab9cd1cSSteven Whitehouse */ 10482ab9cd1cSSteven Whitehouse 10492ab9cd1cSSteven Whitehouse static int gfs2_unlink(struct inode *dir, struct dentry *dentry) 10502ab9cd1cSSteven Whitehouse { 10512ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 10522ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 10532ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 10542ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 10552ab9cd1cSSteven Whitehouse struct buffer_head *bh; 10562ab9cd1cSSteven Whitehouse struct gfs2_holder ghs[3]; 10572ab9cd1cSSteven Whitehouse struct gfs2_rgrpd *rgd; 10582ab9cd1cSSteven Whitehouse struct gfs2_holder ri_gh; 10592ab9cd1cSSteven Whitehouse int error; 10602ab9cd1cSSteven Whitehouse 10612ab9cd1cSSteven Whitehouse error = gfs2_rindex_hold(sdp, &ri_gh); 10622ab9cd1cSSteven Whitehouse if (error) 10632ab9cd1cSSteven Whitehouse return error; 10642ab9cd1cSSteven Whitehouse 10652ab9cd1cSSteven Whitehouse gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 10662ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 10672ab9cd1cSSteven Whitehouse 10682ab9cd1cSSteven Whitehouse rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr); 10692ab9cd1cSSteven Whitehouse gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); 10702ab9cd1cSSteven Whitehouse 10712ab9cd1cSSteven Whitehouse 10722ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs); /* parent */ 10732ab9cd1cSSteven Whitehouse if (error) 10742ab9cd1cSSteven Whitehouse goto out_parent; 10752ab9cd1cSSteven Whitehouse 10762ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 1); /* child */ 10772ab9cd1cSSteven Whitehouse if (error) 10782ab9cd1cSSteven Whitehouse goto out_child; 10792ab9cd1cSSteven Whitehouse 10802ab9cd1cSSteven Whitehouse error = -ENOENT; 10812ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 10822ab9cd1cSSteven Whitehouse goto out_rgrp; 10832ab9cd1cSSteven Whitehouse 10842ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) { 10852ab9cd1cSSteven Whitehouse error = -ENOTEMPTY; 10862ab9cd1cSSteven Whitehouse if (ip->i_entries > 2 || inode->i_nlink > 2) 10872ab9cd1cSSteven Whitehouse goto out_rgrp; 10882ab9cd1cSSteven Whitehouse } 10892ab9cd1cSSteven Whitehouse 10902ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 2); /* rgrp */ 10912ab9cd1cSSteven Whitehouse if (error) 10922ab9cd1cSSteven Whitehouse goto out_rgrp; 10932ab9cd1cSSteven Whitehouse 10942ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(dip, &dentry->d_name, ip); 10952ab9cd1cSSteven Whitehouse if (error) 10962ab9cd1cSSteven Whitehouse goto out_gunlock; 10972ab9cd1cSSteven Whitehouse 10982ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); 10992ab9cd1cSSteven Whitehouse if (error) 11002ab9cd1cSSteven Whitehouse goto out_gunlock; 11012ab9cd1cSSteven Whitehouse 11022ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &bh); 11032ab9cd1cSSteven Whitehouse if (error) 11042ab9cd1cSSteven Whitehouse goto out_end_trans; 11052ab9cd1cSSteven Whitehouse 11062ab9cd1cSSteven Whitehouse error = gfs2_unlink_inode(dip, dentry, bh); 11072ab9cd1cSSteven Whitehouse brelse(bh); 11082ab9cd1cSSteven Whitehouse 11092ab9cd1cSSteven Whitehouse out_end_trans: 11102ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 11112ab9cd1cSSteven Whitehouse out_gunlock: 11122ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 2); 11132ab9cd1cSSteven Whitehouse out_rgrp: 11142ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs + 2); 11152ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 1); 11162ab9cd1cSSteven Whitehouse out_child: 11172ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs + 1); 11182ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs); 11192ab9cd1cSSteven Whitehouse out_parent: 11202ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs); 11212ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&ri_gh); 11222ab9cd1cSSteven Whitehouse return error; 11232ab9cd1cSSteven Whitehouse } 11242ab9cd1cSSteven Whitehouse 11252ab9cd1cSSteven Whitehouse /** 11262ab9cd1cSSteven Whitehouse * gfs2_symlink - Create a symlink 11272ab9cd1cSSteven Whitehouse * @dir: The directory to create the symlink in 11282ab9cd1cSSteven Whitehouse * @dentry: The dentry to put the symlink in 11292ab9cd1cSSteven Whitehouse * @symname: The thing which the link points to 11302ab9cd1cSSteven Whitehouse * 11312ab9cd1cSSteven Whitehouse * Returns: errno 11322ab9cd1cSSteven Whitehouse */ 11332ab9cd1cSSteven Whitehouse 11342ab9cd1cSSteven Whitehouse static int gfs2_symlink(struct inode *dir, struct dentry *dentry, 11352ab9cd1cSSteven Whitehouse const char *symname) 11362ab9cd1cSSteven Whitehouse { 11372ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 1138160b4026SSteven Whitehouse unsigned int size; 11392ab9cd1cSSteven Whitehouse 11402ab9cd1cSSteven Whitehouse size = strlen(symname); 11412ab9cd1cSSteven Whitehouse if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1) 11422ab9cd1cSSteven Whitehouse return -ENAMETOOLONG; 11432ab9cd1cSSteven Whitehouse 1144f2741d98SSteven Whitehouse return gfs2_create_inode(dir, dentry, S_IFLNK | S_IRWXUGO, 0, symname, size); 11452ab9cd1cSSteven Whitehouse } 11462ab9cd1cSSteven Whitehouse 11472ab9cd1cSSteven Whitehouse /** 11482ab9cd1cSSteven Whitehouse * gfs2_mkdir - Make a directory 11492ab9cd1cSSteven Whitehouse * @dir: The parent directory of the new one 11502ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new directory 11512ab9cd1cSSteven Whitehouse * @mode: The mode of the new directory 11522ab9cd1cSSteven Whitehouse * 11532ab9cd1cSSteven Whitehouse * Returns: errno 11542ab9cd1cSSteven Whitehouse */ 11552ab9cd1cSSteven Whitehouse 11562ab9cd1cSSteven Whitehouse static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, int mode) 11572ab9cd1cSSteven Whitehouse { 1158f2741d98SSteven Whitehouse return gfs2_create_inode(dir, dentry, S_IFDIR | mode, 0, NULL, 0); 11592ab9cd1cSSteven Whitehouse } 11602ab9cd1cSSteven Whitehouse 11612ab9cd1cSSteven Whitehouse /** 11622ab9cd1cSSteven Whitehouse * gfs2_mknod - Make a special file 11632ab9cd1cSSteven Whitehouse * @dir: The directory in which the special file will reside 11642ab9cd1cSSteven Whitehouse * @dentry: The dentry of the special file 11652ab9cd1cSSteven Whitehouse * @mode: The mode of the special file 1166f2741d98SSteven Whitehouse * @dev: The device specification of the special file 11672ab9cd1cSSteven Whitehouse * 11682ab9cd1cSSteven Whitehouse */ 11692ab9cd1cSSteven Whitehouse 11702ab9cd1cSSteven Whitehouse static int gfs2_mknod(struct inode *dir, struct dentry *dentry, int mode, 11712ab9cd1cSSteven Whitehouse dev_t dev) 11722ab9cd1cSSteven Whitehouse { 1173f2741d98SSteven Whitehouse return gfs2_create_inode(dir, dentry, mode, dev, NULL, 0); 11742ab9cd1cSSteven Whitehouse } 11752ab9cd1cSSteven Whitehouse 11762ab9cd1cSSteven Whitehouse /* 11772ab9cd1cSSteven Whitehouse * gfs2_ok_to_move - check if it's ok to move a directory to another directory 11782ab9cd1cSSteven Whitehouse * @this: move this 11792ab9cd1cSSteven Whitehouse * @to: to here 11802ab9cd1cSSteven Whitehouse * 11812ab9cd1cSSteven Whitehouse * Follow @to back to the root and make sure we don't encounter @this 11822ab9cd1cSSteven Whitehouse * Assumes we already hold the rename lock. 11832ab9cd1cSSteven Whitehouse * 11842ab9cd1cSSteven Whitehouse * Returns: errno 11852ab9cd1cSSteven Whitehouse */ 11862ab9cd1cSSteven Whitehouse 11872ab9cd1cSSteven Whitehouse static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) 11882ab9cd1cSSteven Whitehouse { 11892ab9cd1cSSteven Whitehouse struct inode *dir = &to->i_inode; 11902ab9cd1cSSteven Whitehouse struct super_block *sb = dir->i_sb; 11912ab9cd1cSSteven Whitehouse struct inode *tmp; 11922ab9cd1cSSteven Whitehouse int error = 0; 11932ab9cd1cSSteven Whitehouse 11942ab9cd1cSSteven Whitehouse igrab(dir); 11952ab9cd1cSSteven Whitehouse 11962ab9cd1cSSteven Whitehouse for (;;) { 11972ab9cd1cSSteven Whitehouse if (dir == &this->i_inode) { 11982ab9cd1cSSteven Whitehouse error = -EINVAL; 11992ab9cd1cSSteven Whitehouse break; 12002ab9cd1cSSteven Whitehouse } 12012ab9cd1cSSteven Whitehouse if (dir == sb->s_root->d_inode) { 12022ab9cd1cSSteven Whitehouse error = 0; 12032ab9cd1cSSteven Whitehouse break; 12042ab9cd1cSSteven Whitehouse } 12052ab9cd1cSSteven Whitehouse 12062ab9cd1cSSteven Whitehouse tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); 12072ab9cd1cSSteven Whitehouse if (IS_ERR(tmp)) { 12082ab9cd1cSSteven Whitehouse error = PTR_ERR(tmp); 12092ab9cd1cSSteven Whitehouse break; 12102ab9cd1cSSteven Whitehouse } 12112ab9cd1cSSteven Whitehouse 12122ab9cd1cSSteven Whitehouse iput(dir); 12132ab9cd1cSSteven Whitehouse dir = tmp; 12142ab9cd1cSSteven Whitehouse } 12152ab9cd1cSSteven Whitehouse 12162ab9cd1cSSteven Whitehouse iput(dir); 12172ab9cd1cSSteven Whitehouse 12182ab9cd1cSSteven Whitehouse return error; 12192ab9cd1cSSteven Whitehouse } 12202ab9cd1cSSteven Whitehouse 12212ab9cd1cSSteven Whitehouse /** 12222ab9cd1cSSteven Whitehouse * gfs2_rename - Rename a file 12232ab9cd1cSSteven Whitehouse * @odir: Parent directory of old file name 12242ab9cd1cSSteven Whitehouse * @odentry: The old dentry of the file 12252ab9cd1cSSteven Whitehouse * @ndir: Parent directory of new file name 12262ab9cd1cSSteven Whitehouse * @ndentry: The new dentry of the file 12272ab9cd1cSSteven Whitehouse * 12282ab9cd1cSSteven Whitehouse * Returns: errno 12292ab9cd1cSSteven Whitehouse */ 12302ab9cd1cSSteven Whitehouse 12312ab9cd1cSSteven Whitehouse static int gfs2_rename(struct inode *odir, struct dentry *odentry, 12322ab9cd1cSSteven Whitehouse struct inode *ndir, struct dentry *ndentry) 12332ab9cd1cSSteven Whitehouse { 12342ab9cd1cSSteven Whitehouse struct gfs2_inode *odip = GFS2_I(odir); 12352ab9cd1cSSteven Whitehouse struct gfs2_inode *ndip = GFS2_I(ndir); 12362ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(odentry->d_inode); 12372ab9cd1cSSteven Whitehouse struct gfs2_inode *nip = NULL; 12382ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(odir); 12392ab9cd1cSSteven Whitehouse struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, }, ri_gh; 12402ab9cd1cSSteven Whitehouse struct gfs2_rgrpd *nrgd; 12412ab9cd1cSSteven Whitehouse unsigned int num_gh; 12422ab9cd1cSSteven Whitehouse int dir_rename = 0; 12432ab9cd1cSSteven Whitehouse int alloc_required = 0; 12442ab9cd1cSSteven Whitehouse unsigned int x; 12452ab9cd1cSSteven Whitehouse int error; 12462ab9cd1cSSteven Whitehouse 12472ab9cd1cSSteven Whitehouse if (ndentry->d_inode) { 12482ab9cd1cSSteven Whitehouse nip = GFS2_I(ndentry->d_inode); 12492ab9cd1cSSteven Whitehouse if (ip == nip) 12502ab9cd1cSSteven Whitehouse return 0; 12512ab9cd1cSSteven Whitehouse } 12522ab9cd1cSSteven Whitehouse 12532ab9cd1cSSteven Whitehouse error = gfs2_rindex_hold(sdp, &ri_gh); 12542ab9cd1cSSteven Whitehouse if (error) 12552ab9cd1cSSteven Whitehouse return error; 12562ab9cd1cSSteven Whitehouse 12572ab9cd1cSSteven Whitehouse if (odip != ndip) { 12582ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 12592ab9cd1cSSteven Whitehouse 0, &r_gh); 12602ab9cd1cSSteven Whitehouse if (error) 12612ab9cd1cSSteven Whitehouse goto out; 12622ab9cd1cSSteven Whitehouse 12632ab9cd1cSSteven Whitehouse if (S_ISDIR(ip->i_inode.i_mode)) { 12642ab9cd1cSSteven Whitehouse dir_rename = 1; 12652ab9cd1cSSteven Whitehouse /* don't move a dirctory into it's subdir */ 12662ab9cd1cSSteven Whitehouse error = gfs2_ok_to_move(ip, ndip); 12672ab9cd1cSSteven Whitehouse if (error) 12682ab9cd1cSSteven Whitehouse goto out_gunlock_r; 12692ab9cd1cSSteven Whitehouse } 12702ab9cd1cSSteven Whitehouse } 12712ab9cd1cSSteven Whitehouse 12722ab9cd1cSSteven Whitehouse num_gh = 1; 12732ab9cd1cSSteven Whitehouse gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 12742ab9cd1cSSteven Whitehouse if (odip != ndip) { 12752ab9cd1cSSteven Whitehouse gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 12762ab9cd1cSSteven Whitehouse num_gh++; 12772ab9cd1cSSteven Whitehouse } 12782ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 12792ab9cd1cSSteven Whitehouse num_gh++; 12802ab9cd1cSSteven Whitehouse 12812ab9cd1cSSteven Whitehouse if (nip) { 12822ab9cd1cSSteven Whitehouse gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 12832ab9cd1cSSteven Whitehouse num_gh++; 12842ab9cd1cSSteven Whitehouse /* grab the resource lock for unlink flag twiddling 12852ab9cd1cSSteven Whitehouse * this is the case of the target file already existing 12862ab9cd1cSSteven Whitehouse * so we unlink before doing the rename 12872ab9cd1cSSteven Whitehouse */ 12882ab9cd1cSSteven Whitehouse nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr); 12892ab9cd1cSSteven Whitehouse if (nrgd) 12902ab9cd1cSSteven Whitehouse gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); 12912ab9cd1cSSteven Whitehouse } 12922ab9cd1cSSteven Whitehouse 12932ab9cd1cSSteven Whitehouse for (x = 0; x < num_gh; x++) { 12942ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + x); 12952ab9cd1cSSteven Whitehouse if (error) 12962ab9cd1cSSteven Whitehouse goto out_gunlock; 12972ab9cd1cSSteven Whitehouse } 12982ab9cd1cSSteven Whitehouse 12992ab9cd1cSSteven Whitehouse error = -ENOENT; 13002ab9cd1cSSteven Whitehouse if (ip->i_inode.i_nlink == 0) 13012ab9cd1cSSteven Whitehouse goto out_gunlock; 13022ab9cd1cSSteven Whitehouse 13032ab9cd1cSSteven Whitehouse /* Check out the old directory */ 13042ab9cd1cSSteven Whitehouse 13052ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(odip, &odentry->d_name, ip); 13062ab9cd1cSSteven Whitehouse if (error) 13072ab9cd1cSSteven Whitehouse goto out_gunlock; 13082ab9cd1cSSteven Whitehouse 13092ab9cd1cSSteven Whitehouse /* Check out the new directory */ 13102ab9cd1cSSteven Whitehouse 13112ab9cd1cSSteven Whitehouse if (nip) { 13122ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 13132ab9cd1cSSteven Whitehouse if (error) 13142ab9cd1cSSteven Whitehouse goto out_gunlock; 13152ab9cd1cSSteven Whitehouse 13162ab9cd1cSSteven Whitehouse if (nip->i_inode.i_nlink == 0) { 13172ab9cd1cSSteven Whitehouse error = -EAGAIN; 13182ab9cd1cSSteven Whitehouse goto out_gunlock; 13192ab9cd1cSSteven Whitehouse } 13202ab9cd1cSSteven Whitehouse 13212ab9cd1cSSteven Whitehouse if (S_ISDIR(nip->i_inode.i_mode)) { 13222ab9cd1cSSteven Whitehouse if (nip->i_entries < 2) { 13232ab9cd1cSSteven Whitehouse gfs2_consist_inode(nip); 13242ab9cd1cSSteven Whitehouse error = -EIO; 13252ab9cd1cSSteven Whitehouse goto out_gunlock; 13262ab9cd1cSSteven Whitehouse } 13272ab9cd1cSSteven Whitehouse if (nip->i_entries > 2) { 13282ab9cd1cSSteven Whitehouse error = -ENOTEMPTY; 13292ab9cd1cSSteven Whitehouse goto out_gunlock; 13302ab9cd1cSSteven Whitehouse } 13312ab9cd1cSSteven Whitehouse } 13322ab9cd1cSSteven Whitehouse } else { 133310556cb2SAl Viro error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); 13342ab9cd1cSSteven Whitehouse if (error) 13352ab9cd1cSSteven Whitehouse goto out_gunlock; 13362ab9cd1cSSteven Whitehouse 13372ab9cd1cSSteven Whitehouse error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); 13382ab9cd1cSSteven Whitehouse switch (error) { 13392ab9cd1cSSteven Whitehouse case -ENOENT: 13402ab9cd1cSSteven Whitehouse error = 0; 13412ab9cd1cSSteven Whitehouse break; 13422ab9cd1cSSteven Whitehouse case 0: 13432ab9cd1cSSteven Whitehouse error = -EEXIST; 13442ab9cd1cSSteven Whitehouse default: 13452ab9cd1cSSteven Whitehouse goto out_gunlock; 13462ab9cd1cSSteven Whitehouse }; 13472ab9cd1cSSteven Whitehouse 13482ab9cd1cSSteven Whitehouse if (odip != ndip) { 13492ab9cd1cSSteven Whitehouse if (!ndip->i_inode.i_nlink) { 13502ab9cd1cSSteven Whitehouse error = -ENOENT; 13512ab9cd1cSSteven Whitehouse goto out_gunlock; 13522ab9cd1cSSteven Whitehouse } 13532ab9cd1cSSteven Whitehouse if (ndip->i_entries == (u32)-1) { 13542ab9cd1cSSteven Whitehouse error = -EFBIG; 13552ab9cd1cSSteven Whitehouse goto out_gunlock; 13562ab9cd1cSSteven Whitehouse } 13572ab9cd1cSSteven Whitehouse if (S_ISDIR(ip->i_inode.i_mode) && 13582ab9cd1cSSteven Whitehouse ndip->i_inode.i_nlink == (u32)-1) { 13592ab9cd1cSSteven Whitehouse error = -EMLINK; 13602ab9cd1cSSteven Whitehouse goto out_gunlock; 13612ab9cd1cSSteven Whitehouse } 13622ab9cd1cSSteven Whitehouse } 13632ab9cd1cSSteven Whitehouse } 13642ab9cd1cSSteven Whitehouse 13652ab9cd1cSSteven Whitehouse /* Check out the dir to be renamed */ 13662ab9cd1cSSteven Whitehouse 13672ab9cd1cSSteven Whitehouse if (dir_rename) { 136810556cb2SAl Viro error = gfs2_permission(odentry->d_inode, MAY_WRITE); 13692ab9cd1cSSteven Whitehouse if (error) 13702ab9cd1cSSteven Whitehouse goto out_gunlock; 13712ab9cd1cSSteven Whitehouse } 13722ab9cd1cSSteven Whitehouse 13732ab9cd1cSSteven Whitehouse if (nip == NULL) 13742ab9cd1cSSteven Whitehouse alloc_required = gfs2_diradd_alloc_required(ndir, &ndentry->d_name); 13752ab9cd1cSSteven Whitehouse error = alloc_required; 13762ab9cd1cSSteven Whitehouse if (error < 0) 13772ab9cd1cSSteven Whitehouse goto out_gunlock; 13782ab9cd1cSSteven Whitehouse error = 0; 13792ab9cd1cSSteven Whitehouse 13802ab9cd1cSSteven Whitehouse if (alloc_required) { 13812ab9cd1cSSteven Whitehouse struct gfs2_alloc *al = gfs2_alloc_get(ndip); 13822ab9cd1cSSteven Whitehouse if (!al) { 13832ab9cd1cSSteven Whitehouse error = -ENOMEM; 13842ab9cd1cSSteven Whitehouse goto out_gunlock; 13852ab9cd1cSSteven Whitehouse } 13862ab9cd1cSSteven Whitehouse 13872ab9cd1cSSteven Whitehouse error = gfs2_quota_lock_check(ndip); 13882ab9cd1cSSteven Whitehouse if (error) 13892ab9cd1cSSteven Whitehouse goto out_alloc; 13902ab9cd1cSSteven Whitehouse 13912ab9cd1cSSteven Whitehouse al->al_requested = sdp->sd_max_dirres; 13922ab9cd1cSSteven Whitehouse 13932ab9cd1cSSteven Whitehouse error = gfs2_inplace_reserve_ri(ndip); 13942ab9cd1cSSteven Whitehouse if (error) 13952ab9cd1cSSteven Whitehouse goto out_gunlock_q; 13962ab9cd1cSSteven Whitehouse 13972ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + 13982ab9cd1cSSteven Whitehouse gfs2_rg_blocks(al) + 13992ab9cd1cSSteven Whitehouse 4 * RES_DINODE + 4 * RES_LEAF + 14002ab9cd1cSSteven Whitehouse RES_STATFS + RES_QUOTA + 4, 0); 14012ab9cd1cSSteven Whitehouse if (error) 14022ab9cd1cSSteven Whitehouse goto out_ipreserv; 14032ab9cd1cSSteven Whitehouse } else { 14042ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 14052ab9cd1cSSteven Whitehouse 5 * RES_LEAF + 4, 0); 14062ab9cd1cSSteven Whitehouse if (error) 14072ab9cd1cSSteven Whitehouse goto out_gunlock; 14082ab9cd1cSSteven Whitehouse } 14092ab9cd1cSSteven Whitehouse 14102ab9cd1cSSteven Whitehouse /* Remove the target file, if it exists */ 14112ab9cd1cSSteven Whitehouse 14122ab9cd1cSSteven Whitehouse if (nip) { 14132ab9cd1cSSteven Whitehouse struct buffer_head *bh; 14142ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(nip, &bh); 14152ab9cd1cSSteven Whitehouse if (error) 14162ab9cd1cSSteven Whitehouse goto out_end_trans; 14172ab9cd1cSSteven Whitehouse error = gfs2_unlink_inode(ndip, ndentry, bh); 14182ab9cd1cSSteven Whitehouse brelse(bh); 14192ab9cd1cSSteven Whitehouse } 14202ab9cd1cSSteven Whitehouse 14212ab9cd1cSSteven Whitehouse if (dir_rename) { 14222ab9cd1cSSteven Whitehouse error = gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); 14232ab9cd1cSSteven Whitehouse if (error) 14242ab9cd1cSSteven Whitehouse goto out_end_trans; 14252ab9cd1cSSteven Whitehouse } else { 14262ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 14272ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 14282ab9cd1cSSteven Whitehouse if (error) 14292ab9cd1cSSteven Whitehouse goto out_end_trans; 14302ab9cd1cSSteven Whitehouse ip->i_inode.i_ctime = CURRENT_TIME; 14312ab9cd1cSSteven Whitehouse gfs2_trans_add_bh(ip->i_gl, dibh, 1); 14322ab9cd1cSSteven Whitehouse gfs2_dinode_out(ip, dibh->b_data); 14332ab9cd1cSSteven Whitehouse brelse(dibh); 14342ab9cd1cSSteven Whitehouse } 14352ab9cd1cSSteven Whitehouse 14362ab9cd1cSSteven Whitehouse error = gfs2_dir_del(odip, odentry); 14372ab9cd1cSSteven Whitehouse if (error) 14382ab9cd1cSSteven Whitehouse goto out_end_trans; 14392ab9cd1cSSteven Whitehouse 14402ab9cd1cSSteven Whitehouse error = gfs2_dir_add(ndir, &ndentry->d_name, ip); 14412ab9cd1cSSteven Whitehouse if (error) 14422ab9cd1cSSteven Whitehouse goto out_end_trans; 14432ab9cd1cSSteven Whitehouse 14442ab9cd1cSSteven Whitehouse out_end_trans: 14452ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 14462ab9cd1cSSteven Whitehouse out_ipreserv: 14472ab9cd1cSSteven Whitehouse if (alloc_required) 14482ab9cd1cSSteven Whitehouse gfs2_inplace_release(ndip); 14492ab9cd1cSSteven Whitehouse out_gunlock_q: 14502ab9cd1cSSteven Whitehouse if (alloc_required) 14512ab9cd1cSSteven Whitehouse gfs2_quota_unlock(ndip); 14522ab9cd1cSSteven Whitehouse out_alloc: 14532ab9cd1cSSteven Whitehouse if (alloc_required) 14542ab9cd1cSSteven Whitehouse gfs2_alloc_put(ndip); 14552ab9cd1cSSteven Whitehouse out_gunlock: 14562ab9cd1cSSteven Whitehouse while (x--) { 14572ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + x); 14582ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs + x); 14592ab9cd1cSSteven Whitehouse } 14602ab9cd1cSSteven Whitehouse out_gunlock_r: 14612ab9cd1cSSteven Whitehouse if (r_gh.gh_gl) 14622ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&r_gh); 14632ab9cd1cSSteven Whitehouse out: 14642ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&ri_gh); 14652ab9cd1cSSteven Whitehouse return error; 14662ab9cd1cSSteven Whitehouse } 14672ab9cd1cSSteven Whitehouse 14682ab9cd1cSSteven Whitehouse /** 14692ab9cd1cSSteven Whitehouse * gfs2_follow_link - Follow a symbolic link 14702ab9cd1cSSteven Whitehouse * @dentry: The dentry of the link 14712ab9cd1cSSteven Whitehouse * @nd: Data that we pass to vfs_follow_link() 14722ab9cd1cSSteven Whitehouse * 14732ab9cd1cSSteven Whitehouse * This can handle symlinks of any size. 14742ab9cd1cSSteven Whitehouse * 14752ab9cd1cSSteven Whitehouse * Returns: 0 on success or error code 14762ab9cd1cSSteven Whitehouse */ 14772ab9cd1cSSteven Whitehouse 14782ab9cd1cSSteven Whitehouse static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd) 14792ab9cd1cSSteven Whitehouse { 14802ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(dentry->d_inode); 14812ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 14822ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 1483160b4026SSteven Whitehouse unsigned int size; 14842ab9cd1cSSteven Whitehouse char *buf; 14852ab9cd1cSSteven Whitehouse int error; 14862ab9cd1cSSteven Whitehouse 14872ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); 14882ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(&i_gh); 14892ab9cd1cSSteven Whitehouse if (error) { 14902ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&i_gh); 14912ab9cd1cSSteven Whitehouse nd_set_link(nd, ERR_PTR(error)); 14922ab9cd1cSSteven Whitehouse return NULL; 14932ab9cd1cSSteven Whitehouse } 14942ab9cd1cSSteven Whitehouse 14952ab9cd1cSSteven Whitehouse size = (unsigned int)i_size_read(&ip->i_inode); 14962ab9cd1cSSteven Whitehouse if (size == 0) { 14972ab9cd1cSSteven Whitehouse gfs2_consist_inode(ip); 14982ab9cd1cSSteven Whitehouse buf = ERR_PTR(-EIO); 14992ab9cd1cSSteven Whitehouse goto out; 15002ab9cd1cSSteven Whitehouse } 15012ab9cd1cSSteven Whitehouse 15022ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 15032ab9cd1cSSteven Whitehouse if (error) { 15042ab9cd1cSSteven Whitehouse buf = ERR_PTR(error); 15052ab9cd1cSSteven Whitehouse goto out; 15062ab9cd1cSSteven Whitehouse } 15072ab9cd1cSSteven Whitehouse 1508160b4026SSteven Whitehouse buf = kzalloc(size + 1, GFP_NOFS); 15092ab9cd1cSSteven Whitehouse if (!buf) 15102ab9cd1cSSteven Whitehouse buf = ERR_PTR(-ENOMEM); 15112ab9cd1cSSteven Whitehouse else 1512160b4026SSteven Whitehouse memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); 15132ab9cd1cSSteven Whitehouse brelse(dibh); 15142ab9cd1cSSteven Whitehouse out: 15152ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 15162ab9cd1cSSteven Whitehouse nd_set_link(nd, buf); 15172ab9cd1cSSteven Whitehouse return NULL; 15182ab9cd1cSSteven Whitehouse } 15192ab9cd1cSSteven Whitehouse 15202ab9cd1cSSteven Whitehouse static void gfs2_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 15212ab9cd1cSSteven Whitehouse { 15222ab9cd1cSSteven Whitehouse char *s = nd_get_link(nd); 15232ab9cd1cSSteven Whitehouse if (!IS_ERR(s)) 15242ab9cd1cSSteven Whitehouse kfree(s); 15252ab9cd1cSSteven Whitehouse } 15262ab9cd1cSSteven Whitehouse 15272ab9cd1cSSteven Whitehouse /** 15282ab9cd1cSSteven Whitehouse * gfs2_permission - 15292ab9cd1cSSteven Whitehouse * @inode: The inode 15302ab9cd1cSSteven Whitehouse * @mask: The mask to be tested 15312ab9cd1cSSteven Whitehouse * @flags: Indicates whether this is an RCU path walk or not 15322ab9cd1cSSteven Whitehouse * 15332ab9cd1cSSteven Whitehouse * This may be called from the VFS directly, or from within GFS2 with the 15342ab9cd1cSSteven Whitehouse * inode locked, so we look to see if the glock is already locked and only 15352ab9cd1cSSteven Whitehouse * lock the glock if its not already been done. 15362ab9cd1cSSteven Whitehouse * 15372ab9cd1cSSteven Whitehouse * Returns: errno 15382ab9cd1cSSteven Whitehouse */ 15392ab9cd1cSSteven Whitehouse 154010556cb2SAl Viro int gfs2_permission(struct inode *inode, int mask) 15412ab9cd1cSSteven Whitehouse { 15422ab9cd1cSSteven Whitehouse struct gfs2_inode *ip; 15432ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 15442ab9cd1cSSteven Whitehouse int error; 15452ab9cd1cSSteven Whitehouse int unlock = 0; 15462ab9cd1cSSteven Whitehouse 15472ab9cd1cSSteven Whitehouse 15482ab9cd1cSSteven Whitehouse ip = GFS2_I(inode); 15492ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 155010556cb2SAl Viro if (mask & MAY_NOT_BLOCK) 15512ab9cd1cSSteven Whitehouse return -ECHILD; 15522ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); 15532ab9cd1cSSteven Whitehouse if (error) 15542ab9cd1cSSteven Whitehouse return error; 15552ab9cd1cSSteven Whitehouse unlock = 1; 15562ab9cd1cSSteven Whitehouse } 15572ab9cd1cSSteven Whitehouse 15582ab9cd1cSSteven Whitehouse if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) 15592ab9cd1cSSteven Whitehouse error = -EACCES; 15602ab9cd1cSSteven Whitehouse else 15612830ba7fSAl Viro error = generic_permission(inode, mask); 15622ab9cd1cSSteven Whitehouse if (unlock) 15632ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 15642ab9cd1cSSteven Whitehouse 15652ab9cd1cSSteven Whitehouse return error; 15662ab9cd1cSSteven Whitehouse } 15672ab9cd1cSSteven Whitehouse 15682ab9cd1cSSteven Whitehouse static int __gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) 15692ab9cd1cSSteven Whitehouse { 15702ab9cd1cSSteven Whitehouse struct inode *inode = &ip->i_inode; 15712ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 15722ab9cd1cSSteven Whitehouse int error; 15732ab9cd1cSSteven Whitehouse 15742ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 15752ab9cd1cSSteven Whitehouse if (error) 15762ab9cd1cSSteven Whitehouse return error; 15772ab9cd1cSSteven Whitehouse 15782ab9cd1cSSteven Whitehouse setattr_copy(inode, attr); 15792ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 15802ab9cd1cSSteven Whitehouse gfs2_trans_add_bh(ip->i_gl, dibh, 1); 15812ab9cd1cSSteven Whitehouse gfs2_dinode_out(ip, dibh->b_data); 15822ab9cd1cSSteven Whitehouse brelse(dibh); 15832ab9cd1cSSteven Whitehouse return 0; 15842ab9cd1cSSteven Whitehouse } 15852ab9cd1cSSteven Whitehouse 15862ab9cd1cSSteven Whitehouse /** 15872ab9cd1cSSteven Whitehouse * gfs2_setattr_simple - 15882ab9cd1cSSteven Whitehouse * @ip: 15892ab9cd1cSSteven Whitehouse * @attr: 15902ab9cd1cSSteven Whitehouse * 15912ab9cd1cSSteven Whitehouse * Returns: errno 15922ab9cd1cSSteven Whitehouse */ 15932ab9cd1cSSteven Whitehouse 15942ab9cd1cSSteven Whitehouse int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) 15952ab9cd1cSSteven Whitehouse { 15962ab9cd1cSSteven Whitehouse int error; 15972ab9cd1cSSteven Whitehouse 15982ab9cd1cSSteven Whitehouse if (current->journal_info) 15992ab9cd1cSSteven Whitehouse return __gfs2_setattr_simple(ip, attr); 16002ab9cd1cSSteven Whitehouse 16012ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE, 0); 16022ab9cd1cSSteven Whitehouse if (error) 16032ab9cd1cSSteven Whitehouse return error; 16042ab9cd1cSSteven Whitehouse 16052ab9cd1cSSteven Whitehouse error = __gfs2_setattr_simple(ip, attr); 16062ab9cd1cSSteven Whitehouse gfs2_trans_end(GFS2_SB(&ip->i_inode)); 16072ab9cd1cSSteven Whitehouse return error; 16082ab9cd1cSSteven Whitehouse } 16092ab9cd1cSSteven Whitehouse 16102ab9cd1cSSteven Whitehouse static int setattr_chown(struct inode *inode, struct iattr *attr) 16112ab9cd1cSSteven Whitehouse { 16122ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 16132ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 16142ab9cd1cSSteven Whitehouse u32 ouid, ogid, nuid, ngid; 16152ab9cd1cSSteven Whitehouse int error; 16162ab9cd1cSSteven Whitehouse 16172ab9cd1cSSteven Whitehouse ouid = inode->i_uid; 16182ab9cd1cSSteven Whitehouse ogid = inode->i_gid; 16192ab9cd1cSSteven Whitehouse nuid = attr->ia_uid; 16202ab9cd1cSSteven Whitehouse ngid = attr->ia_gid; 16212ab9cd1cSSteven Whitehouse 16222ab9cd1cSSteven Whitehouse if (!(attr->ia_valid & ATTR_UID) || ouid == nuid) 16232ab9cd1cSSteven Whitehouse ouid = nuid = NO_QUOTA_CHANGE; 16242ab9cd1cSSteven Whitehouse if (!(attr->ia_valid & ATTR_GID) || ogid == ngid) 16252ab9cd1cSSteven Whitehouse ogid = ngid = NO_QUOTA_CHANGE; 16262ab9cd1cSSteven Whitehouse 16272ab9cd1cSSteven Whitehouse if (!gfs2_alloc_get(ip)) 16282ab9cd1cSSteven Whitehouse return -ENOMEM; 16292ab9cd1cSSteven Whitehouse 16302ab9cd1cSSteven Whitehouse error = gfs2_quota_lock(ip, nuid, ngid); 16312ab9cd1cSSteven Whitehouse if (error) 16322ab9cd1cSSteven Whitehouse goto out_alloc; 16332ab9cd1cSSteven Whitehouse 16342ab9cd1cSSteven Whitehouse if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { 16352ab9cd1cSSteven Whitehouse error = gfs2_quota_check(ip, nuid, ngid); 16362ab9cd1cSSteven Whitehouse if (error) 16372ab9cd1cSSteven Whitehouse goto out_gunlock_q; 16382ab9cd1cSSteven Whitehouse } 16392ab9cd1cSSteven Whitehouse 16402ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); 16412ab9cd1cSSteven Whitehouse if (error) 16422ab9cd1cSSteven Whitehouse goto out_gunlock_q; 16432ab9cd1cSSteven Whitehouse 16442ab9cd1cSSteven Whitehouse error = gfs2_setattr_simple(ip, attr); 16452ab9cd1cSSteven Whitehouse if (error) 16462ab9cd1cSSteven Whitehouse goto out_end_trans; 16472ab9cd1cSSteven Whitehouse 16482ab9cd1cSSteven Whitehouse if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { 16492ab9cd1cSSteven Whitehouse u64 blocks = gfs2_get_inode_blocks(&ip->i_inode); 16502ab9cd1cSSteven Whitehouse gfs2_quota_change(ip, -blocks, ouid, ogid); 16512ab9cd1cSSteven Whitehouse gfs2_quota_change(ip, blocks, nuid, ngid); 16522ab9cd1cSSteven Whitehouse } 16532ab9cd1cSSteven Whitehouse 16542ab9cd1cSSteven Whitehouse out_end_trans: 16552ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 16562ab9cd1cSSteven Whitehouse out_gunlock_q: 16572ab9cd1cSSteven Whitehouse gfs2_quota_unlock(ip); 16582ab9cd1cSSteven Whitehouse out_alloc: 16592ab9cd1cSSteven Whitehouse gfs2_alloc_put(ip); 16602ab9cd1cSSteven Whitehouse return error; 16612ab9cd1cSSteven Whitehouse } 16622ab9cd1cSSteven Whitehouse 16632ab9cd1cSSteven Whitehouse /** 16642ab9cd1cSSteven Whitehouse * gfs2_setattr - Change attributes on an inode 16652ab9cd1cSSteven Whitehouse * @dentry: The dentry which is changing 16662ab9cd1cSSteven Whitehouse * @attr: The structure describing the change 16672ab9cd1cSSteven Whitehouse * 16682ab9cd1cSSteven Whitehouse * The VFS layer wants to change one or more of an inodes attributes. Write 16692ab9cd1cSSteven Whitehouse * that change out to disk. 16702ab9cd1cSSteven Whitehouse * 16712ab9cd1cSSteven Whitehouse * Returns: errno 16722ab9cd1cSSteven Whitehouse */ 16732ab9cd1cSSteven Whitehouse 16742ab9cd1cSSteven Whitehouse static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) 16752ab9cd1cSSteven Whitehouse { 16762ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 16772ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 16782ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 16792ab9cd1cSSteven Whitehouse int error; 16802ab9cd1cSSteven Whitehouse 16812ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); 16822ab9cd1cSSteven Whitehouse if (error) 16832ab9cd1cSSteven Whitehouse return error; 16842ab9cd1cSSteven Whitehouse 16852ab9cd1cSSteven Whitehouse error = -EPERM; 16862ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 16872ab9cd1cSSteven Whitehouse goto out; 16882ab9cd1cSSteven Whitehouse 16892ab9cd1cSSteven Whitehouse error = inode_change_ok(inode, attr); 16902ab9cd1cSSteven Whitehouse if (error) 16912ab9cd1cSSteven Whitehouse goto out; 16922ab9cd1cSSteven Whitehouse 16932ab9cd1cSSteven Whitehouse if (attr->ia_valid & ATTR_SIZE) 16942ab9cd1cSSteven Whitehouse error = gfs2_setattr_size(inode, attr->ia_size); 16952ab9cd1cSSteven Whitehouse else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) 16962ab9cd1cSSteven Whitehouse error = setattr_chown(inode, attr); 16972ab9cd1cSSteven Whitehouse else if ((attr->ia_valid & ATTR_MODE) && IS_POSIXACL(inode)) 16982ab9cd1cSSteven Whitehouse error = gfs2_acl_chmod(ip, attr); 16992ab9cd1cSSteven Whitehouse else 17002ab9cd1cSSteven Whitehouse error = gfs2_setattr_simple(ip, attr); 17012ab9cd1cSSteven Whitehouse 17022ab9cd1cSSteven Whitehouse out: 17032ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 17042ab9cd1cSSteven Whitehouse if (!error) 17052ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 17062ab9cd1cSSteven Whitehouse return error; 17072ab9cd1cSSteven Whitehouse } 17082ab9cd1cSSteven Whitehouse 17092ab9cd1cSSteven Whitehouse /** 17102ab9cd1cSSteven Whitehouse * gfs2_getattr - Read out an inode's attributes 17112ab9cd1cSSteven Whitehouse * @mnt: The vfsmount the inode is being accessed from 17122ab9cd1cSSteven Whitehouse * @dentry: The dentry to stat 17132ab9cd1cSSteven Whitehouse * @stat: The inode's stats 17142ab9cd1cSSteven Whitehouse * 17152ab9cd1cSSteven Whitehouse * This may be called from the VFS directly, or from within GFS2 with the 17162ab9cd1cSSteven Whitehouse * inode locked, so we look to see if the glock is already locked and only 17172ab9cd1cSSteven Whitehouse * lock the glock if its not already been done. Note that its the NFS 17182ab9cd1cSSteven Whitehouse * readdirplus operation which causes this to be called (from filldir) 17192ab9cd1cSSteven Whitehouse * with the glock already held. 17202ab9cd1cSSteven Whitehouse * 17212ab9cd1cSSteven Whitehouse * Returns: errno 17222ab9cd1cSSteven Whitehouse */ 17232ab9cd1cSSteven Whitehouse 17242ab9cd1cSSteven Whitehouse static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry, 17252ab9cd1cSSteven Whitehouse struct kstat *stat) 17262ab9cd1cSSteven Whitehouse { 17272ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 17282ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 17292ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 17302ab9cd1cSSteven Whitehouse int error; 17312ab9cd1cSSteven Whitehouse int unlock = 0; 17322ab9cd1cSSteven Whitehouse 17332ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 17342ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 17352ab9cd1cSSteven Whitehouse if (error) 17362ab9cd1cSSteven Whitehouse return error; 17372ab9cd1cSSteven Whitehouse unlock = 1; 17382ab9cd1cSSteven Whitehouse } 17392ab9cd1cSSteven Whitehouse 17402ab9cd1cSSteven Whitehouse generic_fillattr(inode, stat); 17412ab9cd1cSSteven Whitehouse if (unlock) 17422ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 17432ab9cd1cSSteven Whitehouse 17442ab9cd1cSSteven Whitehouse return 0; 17452ab9cd1cSSteven Whitehouse } 17462ab9cd1cSSteven Whitehouse 17472ab9cd1cSSteven Whitehouse static int gfs2_setxattr(struct dentry *dentry, const char *name, 17482ab9cd1cSSteven Whitehouse const void *data, size_t size, int flags) 17492ab9cd1cSSteven Whitehouse { 17502ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 17512ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 17522ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 17532ab9cd1cSSteven Whitehouse int ret; 17542ab9cd1cSSteven Whitehouse 17552ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 17562ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq(&gh); 17572ab9cd1cSSteven Whitehouse if (ret == 0) { 17582ab9cd1cSSteven Whitehouse ret = generic_setxattr(dentry, name, data, size, flags); 17592ab9cd1cSSteven Whitehouse gfs2_glock_dq(&gh); 17602ab9cd1cSSteven Whitehouse } 17612ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&gh); 17622ab9cd1cSSteven Whitehouse return ret; 17632ab9cd1cSSteven Whitehouse } 17642ab9cd1cSSteven Whitehouse 17652ab9cd1cSSteven Whitehouse static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name, 17662ab9cd1cSSteven Whitehouse void *data, size_t size) 17672ab9cd1cSSteven Whitehouse { 17682ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 17692ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 17702ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 17712ab9cd1cSSteven Whitehouse int ret; 17722ab9cd1cSSteven Whitehouse 17732ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 17742ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq(&gh); 17752ab9cd1cSSteven Whitehouse if (ret == 0) { 17762ab9cd1cSSteven Whitehouse ret = generic_getxattr(dentry, name, data, size); 17772ab9cd1cSSteven Whitehouse gfs2_glock_dq(&gh); 17782ab9cd1cSSteven Whitehouse } 17792ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&gh); 17802ab9cd1cSSteven Whitehouse return ret; 17812ab9cd1cSSteven Whitehouse } 17822ab9cd1cSSteven Whitehouse 17832ab9cd1cSSteven Whitehouse static int gfs2_removexattr(struct dentry *dentry, const char *name) 17842ab9cd1cSSteven Whitehouse { 17852ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 17862ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 17872ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 17882ab9cd1cSSteven Whitehouse int ret; 17892ab9cd1cSSteven Whitehouse 17902ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 17912ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq(&gh); 17922ab9cd1cSSteven Whitehouse if (ret == 0) { 17932ab9cd1cSSteven Whitehouse ret = generic_removexattr(dentry, name); 17942ab9cd1cSSteven Whitehouse gfs2_glock_dq(&gh); 17952ab9cd1cSSteven Whitehouse } 17962ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&gh); 17972ab9cd1cSSteven Whitehouse return ret; 17982ab9cd1cSSteven Whitehouse } 17992ab9cd1cSSteven Whitehouse 18002ab9cd1cSSteven Whitehouse static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 18012ab9cd1cSSteven Whitehouse u64 start, u64 len) 18022ab9cd1cSSteven Whitehouse { 18032ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 18042ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 18052ab9cd1cSSteven Whitehouse int ret; 18062ab9cd1cSSteven Whitehouse 18072ab9cd1cSSteven Whitehouse ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); 18082ab9cd1cSSteven Whitehouse if (ret) 18092ab9cd1cSSteven Whitehouse return ret; 18102ab9cd1cSSteven Whitehouse 18112ab9cd1cSSteven Whitehouse mutex_lock(&inode->i_mutex); 18122ab9cd1cSSteven Whitehouse 18132ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 18142ab9cd1cSSteven Whitehouse if (ret) 18152ab9cd1cSSteven Whitehouse goto out; 18162ab9cd1cSSteven Whitehouse 18172ab9cd1cSSteven Whitehouse if (gfs2_is_stuffed(ip)) { 18182ab9cd1cSSteven Whitehouse u64 phys = ip->i_no_addr << inode->i_blkbits; 18192ab9cd1cSSteven Whitehouse u64 size = i_size_read(inode); 18202ab9cd1cSSteven Whitehouse u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED| 18212ab9cd1cSSteven Whitehouse FIEMAP_EXTENT_DATA_INLINE; 18222ab9cd1cSSteven Whitehouse phys += sizeof(struct gfs2_dinode); 18232ab9cd1cSSteven Whitehouse phys += start; 18242ab9cd1cSSteven Whitehouse if (start + len > size) 18252ab9cd1cSSteven Whitehouse len = size - start; 18262ab9cd1cSSteven Whitehouse if (start < size) 18272ab9cd1cSSteven Whitehouse ret = fiemap_fill_next_extent(fieinfo, start, phys, 18282ab9cd1cSSteven Whitehouse len, flags); 18292ab9cd1cSSteven Whitehouse if (ret == 1) 18302ab9cd1cSSteven Whitehouse ret = 0; 18312ab9cd1cSSteven Whitehouse } else { 18322ab9cd1cSSteven Whitehouse ret = __generic_block_fiemap(inode, fieinfo, start, len, 18332ab9cd1cSSteven Whitehouse gfs2_block_map); 18342ab9cd1cSSteven Whitehouse } 18352ab9cd1cSSteven Whitehouse 18362ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 18372ab9cd1cSSteven Whitehouse out: 18382ab9cd1cSSteven Whitehouse mutex_unlock(&inode->i_mutex); 18392ab9cd1cSSteven Whitehouse return ret; 18402ab9cd1cSSteven Whitehouse } 18412ab9cd1cSSteven Whitehouse 18422ab9cd1cSSteven Whitehouse const struct inode_operations gfs2_file_iops = { 18432ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 18442ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 18452ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 18462ab9cd1cSSteven Whitehouse .setxattr = gfs2_setxattr, 18472ab9cd1cSSteven Whitehouse .getxattr = gfs2_getxattr, 18482ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 18492ab9cd1cSSteven Whitehouse .removexattr = gfs2_removexattr, 18502ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 18514e34e719SChristoph Hellwig .get_acl = gfs2_get_acl, 18522ab9cd1cSSteven Whitehouse }; 18532ab9cd1cSSteven Whitehouse 18542ab9cd1cSSteven Whitehouse const struct inode_operations gfs2_dir_iops = { 18552ab9cd1cSSteven Whitehouse .create = gfs2_create, 18562ab9cd1cSSteven Whitehouse .lookup = gfs2_lookup, 18572ab9cd1cSSteven Whitehouse .link = gfs2_link, 18582ab9cd1cSSteven Whitehouse .unlink = gfs2_unlink, 18592ab9cd1cSSteven Whitehouse .symlink = gfs2_symlink, 18602ab9cd1cSSteven Whitehouse .mkdir = gfs2_mkdir, 18612ab9cd1cSSteven Whitehouse .rmdir = gfs2_unlink, 18622ab9cd1cSSteven Whitehouse .mknod = gfs2_mknod, 18632ab9cd1cSSteven Whitehouse .rename = gfs2_rename, 18642ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 18652ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 18662ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 18672ab9cd1cSSteven Whitehouse .setxattr = gfs2_setxattr, 18682ab9cd1cSSteven Whitehouse .getxattr = gfs2_getxattr, 18692ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 18702ab9cd1cSSteven Whitehouse .removexattr = gfs2_removexattr, 18712ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 18724e34e719SChristoph Hellwig .get_acl = gfs2_get_acl, 18732ab9cd1cSSteven Whitehouse }; 18742ab9cd1cSSteven Whitehouse 18752ab9cd1cSSteven Whitehouse const struct inode_operations gfs2_symlink_iops = { 18762ab9cd1cSSteven Whitehouse .readlink = generic_readlink, 18772ab9cd1cSSteven Whitehouse .follow_link = gfs2_follow_link, 18782ab9cd1cSSteven Whitehouse .put_link = gfs2_put_link, 18792ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 18802ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 18812ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 18822ab9cd1cSSteven Whitehouse .setxattr = gfs2_setxattr, 18832ab9cd1cSSteven Whitehouse .getxattr = gfs2_getxattr, 18842ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 18852ab9cd1cSSteven Whitehouse .removexattr = gfs2_removexattr, 18862ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 18874e34e719SChristoph Hellwig .get_acl = gfs2_get_acl, 18882ab9cd1cSSteven Whitehouse }; 18892ab9cd1cSSteven Whitehouse 1890